Fatemeh Lavajoo - Academia.edu (original) (raw)

Papers by Fatemeh Lavajoo

Journal of Applied Sciences and Environmental Management, May 9, 2016

caspian journal of environmental sciences, Jun 1, 2019

The pikeperch (Sander lucioperca) is an economically important freshwater fish and a valuable foo... more The pikeperch (Sander lucioperca) is an economically important freshwater fish and a valuable food with high market acceptance. It is undergoing important changes in growth and regulatory metabolism during the ontogeny. Hence, the current study aims to investigate the mRNA expression of the growth hormone (gh)/insuline-like growth factor (igf) axis (ghr, igfI, igfbp, igfr), muscle regulatory factors (pax7, myf5, myod, myogenin, mrf, mymk, mstn) and osteogenesis related genes (colla1a, fib1a, on, op, ostn) from hatching through day 40th post hatching (DPH). The average total length (TL) of larvae measured at hatching was 3.6 ± 0.4 mm (67 degree-day) and at the end of experiment (40 DPH, 777 degree-day) was 27.1 ± 1.1 mm. The results showed three phases of gene expression in the egg, larval and juvenile stages of pikeperch ontogenesis. The expression pattern of fib1a and muscle gene myf5 showed the highest value at the egg stage. The growth hormone receptor gene (ghr), mymk and mstnb,...

Scientific Reports, 2020

The tolerance of fish to fasting offers a model to study the regulatory mechanisms and changes pr... more The tolerance of fish to fasting offers a model to study the regulatory mechanisms and changes produced when feeding is restored. Gilthead sea bream juveniles were exposed to a 21-days fasting period followed by 2 h to 7-days refeeding. Fasting provoked a decrease in body weight, somatic indexes, and muscle gene expression of members of the Gh/Igf system, signaling molecules (akt, tor and downstream effectors), proliferation marker pcna, myogenic regulatory factors, myostatin, and proteolytic molecules such as cathepsins or calpains, while most ubiquitin-proteasome system members increased or remained stable. In bone, downregulated expression of Gh/Igf members and osteogenic factors was observed, whereas expression of the osteoclastic marker ctsk was increased. Refeeding recovered the expression of Gh/Igf system, myogenic and osteogenic factors in a sequence similar to that of development. Akt and Tor phosphorylation raised at 2 and 5 h post-refeeding, much faster than its gene expr...

Scientific Reports, Nov 12, 2023

Croatian journal of fisheries : Ribarstvo, Jun 16, 2019

Effects of food availability on larval growth and survival of Spirobranchus kraussii were studied... more Effects of food availability on larval growth and survival of Spirobranchus kraussii were studied by feeding larvae different algal diets. Newly hatched larvae of S. kraussii were fed four different marine microalgae species, singly and in various mixtures. The best growth was observed when fed C. vulgaris, N. oculata as a single species and mixed-algal diet during day 15 after fertilization. Mortality was low for larvae (max. 5%); survival rate more than 95%. These results suggest that S. kraussii larvae have the capacity to feed using alternative sources of energy, and food size and quality can affect their growth and sustainability.

Aquaculture International, 2022

A Serpulidaepolychaetae, Spirobranchuskraussii, was newly recorded in the Persian Gulf, Iran. It ... more A Serpulidaepolychaetae, Spirobranchuskraussii, was newly recorded in the Persian Gulf, Iran. It is the first record of Serpulidae species in Iran. Serpulidaeforms dense aggregations in rocky shores in Bandar Abbas. This research investigated the biological structure and the effect of temperature on embryonic stages of S. kraussii. Sampling was conducted with a quadrant of 10×10 cm, in rocky shores from January to May. The largest specimen of S. kraussiimeasured to a total body length of 36.4 mm, body width of 2.3 mm, total tube length of 48mm, and body wet weight of 0.11mg. Outer surface of tube is white and triangular in cross-section, inner surface colored blue or violet. Body color in ventral surface of thorax is dark violet, blue and pink. The sex ratio in S. kraussii was 1:2 and 1:0.81 in winter and spring respectively. Length-weight relationship was exponential and growth seems to be allometric for S. kraussii. A linear relationship was found between total length and other pa...

The freshwater shrimp, Macrobrachium nipponense is an invasive species which has recently been re... more The freshwater shrimp, Macrobrachium nipponense is an invasive species which has recently been reported in Anzali Wetland, Iran. It exhibited good tolerance and adaption in this wetland ecosystem. This study examined certain aspects of feeding of M. nipponense in three habitats of this wetland. Shrimps were randomly sampled from April 2016 to March 2017. The stomach contents were obtained from 367 specimens ranging in length from 4.2 cm to 6.9 cm. The empty stomach index (VI) showed that this shrimp was a voracious (0 ≤ VI < 20) species in all seasons expect winter, when 99% of the specimens had empty stomachs. Fourteen dietary items were categorized in the three habitats of the wetland, with phytoplankton, mollusks and detritus forms being the dominant food items in the western, central and eastern habitats respectively. The feeding precedence index (FP) revealed that the most abundant portion of food was subsidiary one (50 ≥ FP ≥ 10) and the highest proportions of subsidiary fo...

Wetlands, 2020

The oriental river shrimp (Macrobrachium nipponense), an exotic species, has been well adapted an... more The oriental river shrimp (Macrobrachium nipponense), an exotic species, has been well adapted and dispersed in Iranian freshwater ecosystems. The feeding ecology and trophic level of this species in the Anzali Wetland, southwestern Caspian Sea, was investigated by both a traditional method and the carbon and nitrogen stable isotope technique. The highest feeding index (FI) was seen in mollusca at 35.9%, followed by detritus at 31.3%. While no significant differences were observed in the preference of food items among different seasons. A Bayesian mixing model was used to estimate the contributions of the stomach contents to the isotopic signature of M. nipponense. According to mixing model results, M. nipponense obtain food from gastropod, fish, shrimp (as cannibalism), insecta, other crustacea, aquatic plants, worms, zooplankton, and unrecognizable content (as detritus) with 30.6%, 16.8%, 12.7%, 5.2%, 4.3%, 3.5%, 0.6%, 0.3%, and 25.9%, respectively. M. nipponense showed a high δ 15 N and its trophic level (TL = 3.38) was at the top of the Anzali Wetland food web, close to commercially important fish species such as pike, Esox Lucius. Being at this trophic level, this shrimp is expected to possess high nutritional quality for human consumption.

Journal of Aquatic Food Product Technology, 2018

The proximate content, fatty acids composition, and nutritional quality index (NQI) of Macrobrach... more The proximate content, fatty acids composition, and nutritional quality index (NQI) of Macrobrachium nipponense at three habitats in the Anzali wetland in Iran were investigated as a potential source for human consumption. The highest amounts of protein, lipid, ash, and energy contents in muscle of M. nipponense were showed in autumn (non-reproductive season) (p < 0.05). The main monounsaturated fatty acids (MUFA) were oleic acid (C18:1 n9 C, C18:1 ω9 T) and palmitoleic acid (C16:1). Moreover, the main polyunsaturated fatty acids (PUFA) were docosahexaenoic acid (DHA, C22:6 n3), eicosapentaenoic acid (EPA, C20:5n3), arachidonic acid (ARA, C20:4 n6), linoleic acid (LA, C18:2 ω6), and α-linolenic acid (ALA, C18:3 n3). The predominant individual saturated fatty acid (SFA) was palmitic acid (0.07-13.4%), while oleic acid (14.7-26.3%), EPA (3.5-12.7%) and linoleic acid (0.04-14.9%) represented the most abundant individual MUFA and PUFA in M. nipponense. The highest mean value of EPA +DHA (14.0), n3/n6 (1.02), ΣMUFA/ΣSFA (1.05), ΣPUFA/ΣSFA (1.04), and EPA/ DHA (3.8) ratios in M. nipponense was in autumn. The range of atherogenicity index (AI) and thrombogenicity index (TI) was much lower, from 0.42 to 0.6 and from 0.33 to 0.57, respectively, in terms of season. The results obtained in the present study show that M. nipponense is an excellent nutritional food source in the Anzali wetland.

Croatian Journal of Fisheries, 2019

Effects of food availability on larval growth and survival of Spirobranchus kraussii were studied... more Effects of food availability on larval growth and survival of Spirobranchus kraussii were studied by feeding larvae different algal diets. Newly hatched larvae of S. kraussii were fed four different marine microalgae species, singly and in various mixtures. The best growth was observed when fed C. vulgaris, N. oculata as a single species and mixed-algal diet during day 15 after fertilization. Mortality was low for larvae (max. 5%); survival rate more than 95%. These results suggest that S. kraussii larvae have the capacity to feed using alternative sources of energy, and food size and quality can affect their growth and sustainability.

Journal of Applied Sciences and Environmental Management, 2016

The application of cyanobacterial and diatom cultures for the treatment of industrial effluents h... more The application of cyanobacterial and diatom cultures for the treatment of industrial effluents has been well recognized.In this study aimed to evaluate the effect of urban sewage on growth of Spirolina plantensis and Chaetoceros muelleri. The experiment was conducted in 6 treatments as a growth medium. Result showed that in treatment 5 maximum cell densities was (565×10 2 ±237.7) at day7 thus treatment 5 has best condition for growth S. plantensis and in treatment 3 maximum cell density was (825×10 4 ±92) at day13.Treatment 5 has best condition for growth C. muelleri. Total chlorophyll a, contents (µg/1) recorded in S. Plantensi sand C. muelleri was highest at treatment 3(0.21±0.07) and treatment 4(0.23± 0.10) respectively. In present investigation, both the algal species can be good potential to growth in urban sewage. The urban sewage removal efficiency of C. muelleri was higher as compare to S.plantensis which can be recommended for phytoremediation purpose. © JASEM

Journal of Applied Sciences and Environmental Management, 2015

The applications of blue green algae for the treatment of urban and industrial sewage have receiv... more The applications of blue green algae for the treatment of urban and industrial sewage have received more attention during the recent years because they have the capacity to use nitrogenous compounds, ammonia and phosphates. In this study aimed to evaluate the ability of Spirolina platensis for absorption of nitrate and phosphate from urban sewage. The experiment was conducted in 6 treatments as a growth medium. To test these predictions, we conducted a 15 days in indoor place under similar laboratory conditions at temperature (30º C ± 2º C), Light (2500 ± 500) Lux, pH between 8.0 and 11and with constant aeration. Regarding the culture media, a higher algal density was observed in the cultivation developed at treatment 5 (824 ±10 2 cell. mL-1). In our results showed higher efficiencies of phosphorus removal by S. platensis as compare to nitrate removal thus, S. platensis would be effective for nitrate removal only at relatively low concentrations and phosphorus removal at high concentrations. Chlorophyll-a, content in treatment 3 was higher than other treatments. Kruscal-Wallis test showed a significant difference in treatments at the level of P<0.05. Thus, we recommend here that Spirolina platensis to be better candidate for absorption phosphate more than nitrate and it could be used for the removal or biotransformation urban sewage. © JASEM

Journal of Oceanography, Oct 15, 2014

International journal of biological macromolecules, Jan 13, 2016

Marine environment consists of the largest sources diversified genetic pool of material with an e... more Marine environment consists of the largest sources diversified genetic pool of material with an enormous potential for a wide variety of enzymes including proteases. A protease hydrolyzes the peptide bond and most of proteases possess many industrial applications. Marine proteases differ considerably from those found in internal or external organs of invertebrates and vertebrates. In common with all enzymes, external factors such as temperature, pH and type of media are important for the activity, catalytic efficiency, stability and proper functioning of proteases. In this review valuable characteristics of proteases in marine organisms and their applications are gathered from a wide literature survey. Considering their biochemical significance and their increasing importance in biotechnology, a thorough understanding of marine proteases functioning could be of prime importance.

Journal of Applied Sciences and Environmental Management, May 9, 2016

caspian journal of environmental sciences, Jun 1, 2019

The pikeperch (Sander lucioperca) is an economically important freshwater fish and a valuable foo... more The pikeperch (Sander lucioperca) is an economically important freshwater fish and a valuable food with high market acceptance. It is undergoing important changes in growth and regulatory metabolism during the ontogeny. Hence, the current study aims to investigate the mRNA expression of the growth hormone (gh)/insuline-like growth factor (igf) axis (ghr, igfI, igfbp, igfr), muscle regulatory factors (pax7, myf5, myod, myogenin, mrf, mymk, mstn) and osteogenesis related genes (colla1a, fib1a, on, op, ostn) from hatching through day 40th post hatching (DPH). The average total length (TL) of larvae measured at hatching was 3.6 ± 0.4 mm (67 degree-day) and at the end of experiment (40 DPH, 777 degree-day) was 27.1 ± 1.1 mm. The results showed three phases of gene expression in the egg, larval and juvenile stages of pikeperch ontogenesis. The expression pattern of fib1a and muscle gene myf5 showed the highest value at the egg stage. The growth hormone receptor gene (ghr), mymk and mstnb,...

Scientific Reports, 2020

The tolerance of fish to fasting offers a model to study the regulatory mechanisms and changes pr... more The tolerance of fish to fasting offers a model to study the regulatory mechanisms and changes produced when feeding is restored. Gilthead sea bream juveniles were exposed to a 21-days fasting period followed by 2 h to 7-days refeeding. Fasting provoked a decrease in body weight, somatic indexes, and muscle gene expression of members of the Gh/Igf system, signaling molecules (akt, tor and downstream effectors), proliferation marker pcna, myogenic regulatory factors, myostatin, and proteolytic molecules such as cathepsins or calpains, while most ubiquitin-proteasome system members increased or remained stable. In bone, downregulated expression of Gh/Igf members and osteogenic factors was observed, whereas expression of the osteoclastic marker ctsk was increased. Refeeding recovered the expression of Gh/Igf system, myogenic and osteogenic factors in a sequence similar to that of development. Akt and Tor phosphorylation raised at 2 and 5 h post-refeeding, much faster than its gene expr...

Scientific Reports, Nov 12, 2023

Croatian journal of fisheries : Ribarstvo, Jun 16, 2019

Effects of food availability on larval growth and survival of Spirobranchus kraussii were studied... more Effects of food availability on larval growth and survival of Spirobranchus kraussii were studied by feeding larvae different algal diets. Newly hatched larvae of S. kraussii were fed four different marine microalgae species, singly and in various mixtures. The best growth was observed when fed C. vulgaris, N. oculata as a single species and mixed-algal diet during day 15 after fertilization. Mortality was low for larvae (max. 5%); survival rate more than 95%. These results suggest that S. kraussii larvae have the capacity to feed using alternative sources of energy, and food size and quality can affect their growth and sustainability.

Aquaculture International, 2022

A Serpulidaepolychaetae, Spirobranchuskraussii, was newly recorded in the Persian Gulf, Iran. It ... more A Serpulidaepolychaetae, Spirobranchuskraussii, was newly recorded in the Persian Gulf, Iran. It is the first record of Serpulidae species in Iran. Serpulidaeforms dense aggregations in rocky shores in Bandar Abbas. This research investigated the biological structure and the effect of temperature on embryonic stages of S. kraussii. Sampling was conducted with a quadrant of 10×10 cm, in rocky shores from January to May. The largest specimen of S. kraussiimeasured to a total body length of 36.4 mm, body width of 2.3 mm, total tube length of 48mm, and body wet weight of 0.11mg. Outer surface of tube is white and triangular in cross-section, inner surface colored blue or violet. Body color in ventral surface of thorax is dark violet, blue and pink. The sex ratio in S. kraussii was 1:2 and 1:0.81 in winter and spring respectively. Length-weight relationship was exponential and growth seems to be allometric for S. kraussii. A linear relationship was found between total length and other pa...

The freshwater shrimp, Macrobrachium nipponense is an invasive species which has recently been re... more The freshwater shrimp, Macrobrachium nipponense is an invasive species which has recently been reported in Anzali Wetland, Iran. It exhibited good tolerance and adaption in this wetland ecosystem. This study examined certain aspects of feeding of M. nipponense in three habitats of this wetland. Shrimps were randomly sampled from April 2016 to March 2017. The stomach contents were obtained from 367 specimens ranging in length from 4.2 cm to 6.9 cm. The empty stomach index (VI) showed that this shrimp was a voracious (0 ≤ VI < 20) species in all seasons expect winter, when 99% of the specimens had empty stomachs. Fourteen dietary items were categorized in the three habitats of the wetland, with phytoplankton, mollusks and detritus forms being the dominant food items in the western, central and eastern habitats respectively. The feeding precedence index (FP) revealed that the most abundant portion of food was subsidiary one (50 ≥ FP ≥ 10) and the highest proportions of subsidiary fo...

Wetlands, 2020

The oriental river shrimp (Macrobrachium nipponense), an exotic species, has been well adapted an... more The oriental river shrimp (Macrobrachium nipponense), an exotic species, has been well adapted and dispersed in Iranian freshwater ecosystems. The feeding ecology and trophic level of this species in the Anzali Wetland, southwestern Caspian Sea, was investigated by both a traditional method and the carbon and nitrogen stable isotope technique. The highest feeding index (FI) was seen in mollusca at 35.9%, followed by detritus at 31.3%. While no significant differences were observed in the preference of food items among different seasons. A Bayesian mixing model was used to estimate the contributions of the stomach contents to the isotopic signature of M. nipponense. According to mixing model results, M. nipponense obtain food from gastropod, fish, shrimp (as cannibalism), insecta, other crustacea, aquatic plants, worms, zooplankton, and unrecognizable content (as detritus) with 30.6%, 16.8%, 12.7%, 5.2%, 4.3%, 3.5%, 0.6%, 0.3%, and 25.9%, respectively. M. nipponense showed a high δ 15 N and its trophic level (TL = 3.38) was at the top of the Anzali Wetland food web, close to commercially important fish species such as pike, Esox Lucius. Being at this trophic level, this shrimp is expected to possess high nutritional quality for human consumption.

Journal of Aquatic Food Product Technology, 2018

The proximate content, fatty acids composition, and nutritional quality index (NQI) of Macrobrach... more The proximate content, fatty acids composition, and nutritional quality index (NQI) of Macrobrachium nipponense at three habitats in the Anzali wetland in Iran were investigated as a potential source for human consumption. The highest amounts of protein, lipid, ash, and energy contents in muscle of M. nipponense were showed in autumn (non-reproductive season) (p < 0.05). The main monounsaturated fatty acids (MUFA) were oleic acid (C18:1 n9 C, C18:1 ω9 T) and palmitoleic acid (C16:1). Moreover, the main polyunsaturated fatty acids (PUFA) were docosahexaenoic acid (DHA, C22:6 n3), eicosapentaenoic acid (EPA, C20:5n3), arachidonic acid (ARA, C20:4 n6), linoleic acid (LA, C18:2 ω6), and α-linolenic acid (ALA, C18:3 n3). The predominant individual saturated fatty acid (SFA) was palmitic acid (0.07-13.4%), while oleic acid (14.7-26.3%), EPA (3.5-12.7%) and linoleic acid (0.04-14.9%) represented the most abundant individual MUFA and PUFA in M. nipponense. The highest mean value of EPA +DHA (14.0), n3/n6 (1.02), ΣMUFA/ΣSFA (1.05), ΣPUFA/ΣSFA (1.04), and EPA/ DHA (3.8) ratios in M. nipponense was in autumn. The range of atherogenicity index (AI) and thrombogenicity index (TI) was much lower, from 0.42 to 0.6 and from 0.33 to 0.57, respectively, in terms of season. The results obtained in the present study show that M. nipponense is an excellent nutritional food source in the Anzali wetland.

Croatian Journal of Fisheries, 2019

Effects of food availability on larval growth and survival of Spirobranchus kraussii were studied... more Effects of food availability on larval growth and survival of Spirobranchus kraussii were studied by feeding larvae different algal diets. Newly hatched larvae of S. kraussii were fed four different marine microalgae species, singly and in various mixtures. The best growth was observed when fed C. vulgaris, N. oculata as a single species and mixed-algal diet during day 15 after fertilization. Mortality was low for larvae (max. 5%); survival rate more than 95%. These results suggest that S. kraussii larvae have the capacity to feed using alternative sources of energy, and food size and quality can affect their growth and sustainability.

Journal of Applied Sciences and Environmental Management, 2016

The application of cyanobacterial and diatom cultures for the treatment of industrial effluents h... more The application of cyanobacterial and diatom cultures for the treatment of industrial effluents has been well recognized.In this study aimed to evaluate the effect of urban sewage on growth of Spirolina plantensis and Chaetoceros muelleri. The experiment was conducted in 6 treatments as a growth medium. Result showed that in treatment 5 maximum cell densities was (565×10 2 ±237.7) at day7 thus treatment 5 has best condition for growth S. plantensis and in treatment 3 maximum cell density was (825×10 4 ±92) at day13.Treatment 5 has best condition for growth C. muelleri. Total chlorophyll a, contents (µg/1) recorded in S. Plantensi sand C. muelleri was highest at treatment 3(0.21±0.07) and treatment 4(0.23± 0.10) respectively. In present investigation, both the algal species can be good potential to growth in urban sewage. The urban sewage removal efficiency of C. muelleri was higher as compare to S.plantensis which can be recommended for phytoremediation purpose. © JASEM

Journal of Applied Sciences and Environmental Management, 2015

The applications of blue green algae for the treatment of urban and industrial sewage have receiv... more The applications of blue green algae for the treatment of urban and industrial sewage have received more attention during the recent years because they have the capacity to use nitrogenous compounds, ammonia and phosphates. In this study aimed to evaluate the ability of Spirolina platensis for absorption of nitrate and phosphate from urban sewage. The experiment was conducted in 6 treatments as a growth medium. To test these predictions, we conducted a 15 days in indoor place under similar laboratory conditions at temperature (30º C ± 2º C), Light (2500 ± 500) Lux, pH between 8.0 and 11and with constant aeration. Regarding the culture media, a higher algal density was observed in the cultivation developed at treatment 5 (824 ±10 2 cell. mL-1). In our results showed higher efficiencies of phosphorus removal by S. platensis as compare to nitrate removal thus, S. platensis would be effective for nitrate removal only at relatively low concentrations and phosphorus removal at high concentrations. Chlorophyll-a, content in treatment 3 was higher than other treatments. Kruscal-Wallis test showed a significant difference in treatments at the level of P<0.05. Thus, we recommend here that Spirolina platensis to be better candidate for absorption phosphate more than nitrate and it could be used for the removal or biotransformation urban sewage. © JASEM

Journal of Oceanography, Oct 15, 2014

International journal of biological macromolecules, Jan 13, 2016

Marine environment consists of the largest sources diversified genetic pool of material with an e... more Marine environment consists of the largest sources diversified genetic pool of material with an enormous potential for a wide variety of enzymes including proteases. A protease hydrolyzes the peptide bond and most of proteases possess many industrial applications. Marine proteases differ considerably from those found in internal or external organs of invertebrates and vertebrates. In common with all enzymes, external factors such as temperature, pH and type of media are important for the activity, catalytic efficiency, stability and proper functioning of proteases. In this review valuable characteristics of proteases in marine organisms and their applications are gathered from a wide literature survey. Considering their biochemical significance and their increasing importance in biotechnology, a thorough understanding of marine proteases functioning could be of prime importance.