Jojean Pondang | Department of Education, Phillipines (original) (raw)
Papers by Jojean Pondang
International Journal of Biosciences (IJB)
Fish often serves as a staple food and protein source. Most Filipinos depend on fishing activitie... more Fish often serves as a staple food and protein source. Most Filipinos depend on fishing activities as a means of living. Fish parasites are diverse and pervasive organisms affecting a variety of hosts, including commercially important fish. Despite being utilized for commercial purposes, limited studies on fish parasitism are done in the Caraga region and are published in the Philippines. This study is one of the few conducted on the prevalence of parasites from the coast of Cabadbaran City and Lake Mainit in Jabonga, Agusan Del Norte, Phils. The two areas were the major fishing ground for different fish varieties sold in the local market. Two fish samples were collected: Glossogobius guiris (n=100) and Sardinella lemuru (n=100). Standardized protocols for fish parasite investigation were adopted. From the collected fish samples, the gastrointestinal tract was subjected, then examined and isolated. Of the 200 individuals, there were 2 found infected withG. guiris and 8 infected withS. lemuru. The recorded parasite was identified as Nematodes and was mostly observed in marine fish species (S. lemuru) when compared to freshwater fish (G. guiris). This implies that the occurrence of these parasites may vary depending on the fish type, maturity, diet composition, and location. A significant difference p=0.0003 was observed in the length-weight and prevalence of fish parasites and infers that size structure is associated with parasitic rate. Thus, the importance of conducting fish parasites could give an understanding of how this ubiquitous organism affects commercially important fish and awareness to the fish-eating community.
DOAJ (DOAJ: Directory of Open Access Journals), Mar 1, 2022
Geometric morphometric is an efficient and systematic tool to identify unnoticeable shape differe... more Geometric morphometric is an efficient and systematic tool to identify unnoticeable shape differences among biological entities. Sharpnose Hammer Coaker (Johnius borneensis) is a brackish fish and serves as a resource commodity in the study area. The study aims to investigate the body shape variations among its population. 100 individuals comprising 50 males and 50 females of the same size were collected and subjected to Symmetry and Asymmetry Geometric Data Software (SAGE). Procrustes ANOVA shows that males have a significant difference (P<0.0001) among the factors analyzed (Individuals, Sides, and Individuals x sides). While females two factors (Sides and Individuals x Sides) show a significant difference (P<0.0001), however, the individuals show non-significant. Principal Component Analysis in male fish shows a total of (82.92%) while female shows (84.55%). This implied body shape variation from the collected samples. Thus, it represents a difference in morphology. While indicating a subtle detail on how male populations differ from female populations and vice versa. The importance of geometric morphometric analysis provides a vital tool to define discreet morphological variations among species of the same taxa.
International Academy of Ecology and Environmental Sciences, 2022
Geometric morphometric is an efficient and systematic tool to identify unnoticeable shape differe... more Geometric morphometric is an efficient and systematic tool to identify unnoticeable shape differences among biological entities. Sharpnose Hammer Coaker (Johnius borneensis) is a brackish fish and serves as a resource commodity in the study area. The study aims to investigate the body shape variations among its population. 100 individuals comprising 50 males and 50 females of the same size were collected and subjected to Symmetry and Asymmetry Geometric Data Software (SAGE). Procrustes ANOVA shows that males have a significant difference (P<0.0001) among the factors analyzed (Individuals, Sides, and Individuals x sides). While females two factors (Sides and Individuals x Sides) show a significant difference (P<0.0001), however, the individuals show non-significant. Principal Component Analysis in male fish shows a total of (82.92%) while female shows (84.55%). This implied body shape variation from the collected samples. Thus, it represents a difference in morphology. While indicating a subtle detail on how male populations differ from female populations and vice versa. The importance of geometric morphometric analysis provides a vital tool to define discreet morphological variations among species of the same taxa.
International Journal of Biosciences, 2023
Fish often serves as a staple food and protein source. Most Filipinos depend on fishing activitie... more Fish often serves as a staple food and protein source. Most Filipinos depend on fishing activities as a means of living. Fish parasites are diverse and pervasive organisms affecting a variety of hosts, including commercially important fish. Despite being utilized for commercial purposes, limited studies on fish parasitism are done in the Caraga region and are published in the Philippines. This study is one of the few conducted on the prevalence of parasites from the coast of Cabadbaran City and Lake Mainit in Jabonga, Agusan Del Norte, Phils. The two areas were the major fishing ground for different fish varieties sold in the local market. Two fish samples were collected: Glossogobius guiris (n=100) and Sardinella lemuru (n=100). Standardized protocols for fish parasite investigation were adopted. From the collected fish samples, the gastrointestinal tract was subjected, then examined and isolated. Of the 200 individuals, there were 2 found infected withG. guiris and 8 infected withS. lemuru. The recorded parasite was identified as Nematodes and was mostly observed in marine fish species (S. lemuru) when compared to freshwater fish (G. guiris). This implies that the occurrence of these parasites may vary depending on the fish type, maturity, diet composition, and location. A significant difference p=0.0003 was observed in the length-weight and prevalence of fish parasites and infers that size structure is associated with parasitic rate. Thus, the importance of conducting fish parasites could give an understanding of how this ubiquitous organism affects commercially important fish and awareness to the fish-eating community.
International Journal of Fisheries and Aquatic Studies, 2019
Genomic and environmental adaptation possibly develops to phenotypic plasticity. As expected, thi... more Genomic and environmental adaptation possibly develops to phenotypic plasticity. As expected, this results to the structural variation that affects symmetrical outlines of species. Systematized techniques such as geometric morphometrics were applied to detect the phenomenon while considering landmark points to identify the fluctuating asymmetry (FA). FA illustrates deviations from the original state of symmetry. It quantifies variations between the left and right side of bilateral structure hence the two sides are genetically alike. In this study morphological differences of Selaroides leptolepis were investigated. About 60 individuals consisting of 30 males and 30 females were collected and analyzed for fluctuating asymmetry. FA from both samples subjected to Procrustes ANOVA, Principal Component Analysis (PCA), Implied Deformation and Histogram to evaluate the asymmetrical differences using Symmetry and Asymmetry in Geometric Data (SAGE) software. The result shows highly significa...
International Journal of Biosciences (IJB)
Fish often serves as a staple food and protein source. Most Filipinos depend on fishing activitie... more Fish often serves as a staple food and protein source. Most Filipinos depend on fishing activities as a means of living. Fish parasites are diverse and pervasive organisms affecting a variety of hosts, including commercially important fish. Despite being utilized for commercial purposes, limited studies on fish parasitism are done in the Caraga region and are published in the Philippines. This study is one of the few conducted on the prevalence of parasites from the coast of Cabadbaran City and Lake Mainit in Jabonga, Agusan Del Norte, Phils. The two areas were the major fishing ground for different fish varieties sold in the local market. Two fish samples were collected: Glossogobius guiris (n=100) and Sardinella lemuru (n=100). Standardized protocols for fish parasite investigation were adopted. From the collected fish samples, the gastrointestinal tract was subjected, then examined and isolated. Of the 200 individuals, there were 2 found infected withG. guiris and 8 infected withS. lemuru. The recorded parasite was identified as Nematodes and was mostly observed in marine fish species (S. lemuru) when compared to freshwater fish (G. guiris). This implies that the occurrence of these parasites may vary depending on the fish type, maturity, diet composition, and location. A significant difference p=0.0003 was observed in the length-weight and prevalence of fish parasites and infers that size structure is associated with parasitic rate. Thus, the importance of conducting fish parasites could give an understanding of how this ubiquitous organism affects commercially important fish and awareness to the fish-eating community.
DOAJ (DOAJ: Directory of Open Access Journals), Mar 1, 2022
Geometric morphometric is an efficient and systematic tool to identify unnoticeable shape differe... more Geometric morphometric is an efficient and systematic tool to identify unnoticeable shape differences among biological entities. Sharpnose Hammer Coaker (Johnius borneensis) is a brackish fish and serves as a resource commodity in the study area. The study aims to investigate the body shape variations among its population. 100 individuals comprising 50 males and 50 females of the same size were collected and subjected to Symmetry and Asymmetry Geometric Data Software (SAGE). Procrustes ANOVA shows that males have a significant difference (P<0.0001) among the factors analyzed (Individuals, Sides, and Individuals x sides). While females two factors (Sides and Individuals x Sides) show a significant difference (P<0.0001), however, the individuals show non-significant. Principal Component Analysis in male fish shows a total of (82.92%) while female shows (84.55%). This implied body shape variation from the collected samples. Thus, it represents a difference in morphology. While indicating a subtle detail on how male populations differ from female populations and vice versa. The importance of geometric morphometric analysis provides a vital tool to define discreet morphological variations among species of the same taxa.
International Academy of Ecology and Environmental Sciences, 2022
Geometric morphometric is an efficient and systematic tool to identify unnoticeable shape differe... more Geometric morphometric is an efficient and systematic tool to identify unnoticeable shape differences among biological entities. Sharpnose Hammer Coaker (Johnius borneensis) is a brackish fish and serves as a resource commodity in the study area. The study aims to investigate the body shape variations among its population. 100 individuals comprising 50 males and 50 females of the same size were collected and subjected to Symmetry and Asymmetry Geometric Data Software (SAGE). Procrustes ANOVA shows that males have a significant difference (P<0.0001) among the factors analyzed (Individuals, Sides, and Individuals x sides). While females two factors (Sides and Individuals x Sides) show a significant difference (P<0.0001), however, the individuals show non-significant. Principal Component Analysis in male fish shows a total of (82.92%) while female shows (84.55%). This implied body shape variation from the collected samples. Thus, it represents a difference in morphology. While indicating a subtle detail on how male populations differ from female populations and vice versa. The importance of geometric morphometric analysis provides a vital tool to define discreet morphological variations among species of the same taxa.
International Journal of Biosciences, 2023
Fish often serves as a staple food and protein source. Most Filipinos depend on fishing activitie... more Fish often serves as a staple food and protein source. Most Filipinos depend on fishing activities as a means of living. Fish parasites are diverse and pervasive organisms affecting a variety of hosts, including commercially important fish. Despite being utilized for commercial purposes, limited studies on fish parasitism are done in the Caraga region and are published in the Philippines. This study is one of the few conducted on the prevalence of parasites from the coast of Cabadbaran City and Lake Mainit in Jabonga, Agusan Del Norte, Phils. The two areas were the major fishing ground for different fish varieties sold in the local market. Two fish samples were collected: Glossogobius guiris (n=100) and Sardinella lemuru (n=100). Standardized protocols for fish parasite investigation were adopted. From the collected fish samples, the gastrointestinal tract was subjected, then examined and isolated. Of the 200 individuals, there were 2 found infected withG. guiris and 8 infected withS. lemuru. The recorded parasite was identified as Nematodes and was mostly observed in marine fish species (S. lemuru) when compared to freshwater fish (G. guiris). This implies that the occurrence of these parasites may vary depending on the fish type, maturity, diet composition, and location. A significant difference p=0.0003 was observed in the length-weight and prevalence of fish parasites and infers that size structure is associated with parasitic rate. Thus, the importance of conducting fish parasites could give an understanding of how this ubiquitous organism affects commercially important fish and awareness to the fish-eating community.
International Journal of Fisheries and Aquatic Studies, 2019
Genomic and environmental adaptation possibly develops to phenotypic plasticity. As expected, thi... more Genomic and environmental adaptation possibly develops to phenotypic plasticity. As expected, this results to the structural variation that affects symmetrical outlines of species. Systematized techniques such as geometric morphometrics were applied to detect the phenomenon while considering landmark points to identify the fluctuating asymmetry (FA). FA illustrates deviations from the original state of symmetry. It quantifies variations between the left and right side of bilateral structure hence the two sides are genetically alike. In this study morphological differences of Selaroides leptolepis were investigated. About 60 individuals consisting of 30 males and 30 females were collected and analyzed for fluctuating asymmetry. FA from both samples subjected to Procrustes ANOVA, Principal Component Analysis (PCA), Implied Deformation and Histogram to evaluate the asymmetrical differences using Symmetry and Asymmetry in Geometric Data (SAGE) software. The result shows highly significa...