Oogenesis and ovarian health problems in economically important fishes from different habitats potentially affected by pollution in Thailand

Sopon Anek, . and Sudtongkong Chanyut, . and Jiraungkoorskul Wannee, . and Kenthao Anan, . and Bunsomboonsakul Suratta, . and Kettratad Jes, . and Senarat Sinlapachai, . and Siriwong Wattasit, . and Kaneko Gen, . Oogenesis and ovarian health problems in economically important fishes from different habitats potentially affected by pollution in Thailand. pp. 274-286. ISSN 0116-6514

It is well-known that pollutants affect aquatic ecosystems; however there is little information on fish reproductive health as an indicator of aquatic pollution. This study reports the oogenesis and ovarian health problems in important fishes from different habitats potentially affected by pollution. Nine fish species caught in 2016 to 2017 were studied: Atherinomorus pinguis (Lacpde 1803) Alepocephalus bicolor Alcock 1891 and Neoscopelus microchir Matsubara 1943 from the mesopelagic habitats; Monacanthus chinensis (Osbeck 1765) from the coastal habitat; and Nuchequula gerreoides (Bleeker 1851) Eubleekeria splendens (Cuvier 1829) Pisodonophis boro (Hamilton 1822) and Allenbatrachus grunniens (Linnaeus 1758) from the estuarine habitat. Hippocampus barbouri Jordan Richardson 1908 under captive condition was used as a control. The oogenetic processes were similar in all species examined and classified into two phases according to the nuclear and ooplasmic characteristics: primary growth (PG) and secondary growth (SG) phases. The PG and SG phases were further divided into two and three substages respectively. The occurrence of the ovotestis (6.66 ) in A. grunniens suggested the environmental endocrine disruption in its habitat. Atretic oocytes (AO) characterised by the abnormal shape and degeneration of yolk granules and follicular complexes in both PG and SG phases were observed. The AOs were found in all fishes but the ratio was significantly higher in mesopelagic and estuarine fishes compared to other fishes. It is plausible that the mesopelagic and estuarine fishes have poor reproductive health. The results of the study warrant further investigations on water quality associated with the longterm conservation efforts on the marine and estuarine ecosystems of Thailand.

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Abstract

It is well-known that pollutants affect aquatic ecosystems; however there is little information on fish reproductive health as an indicator of aquatic pollution. This study reports the oogenesis and ovarian health problems in important fishes from different habitats potentially affected by pollution. Nine fish species caught in 2016 to 2017 were studied: Atherinomorus pinguis (Lacpde 1803) Alepocephalus bicolor Alcock 1891 and Neoscopelus microchir Matsubara 1943 from the mesopelagic habitats; Monacanthus chinensis (Osbeck 1765) from the coastal habitat; and Nuchequula gerreoides (Bleeker 1851) Eubleekeria splendens (Cuvier 1829) Pisodonophis boro (Hamilton 1822) and Allenbatrachus grunniens (Linnaeus 1758) from the estuarine habitat. Hippocampus barbouri Jordan Richardson 1908 under captive condition was used as a control. The oogenetic processes were similar in all species examined and classified into two phases according to the nuclear and ooplasmic characteristics: primary growth (PG) and secondary growth (SG) phases. The PG and SG phases were further divided into two and three substages respectively. The occurrence of the ovotestis (6.66 ) in A. grunniens suggested the environmental endocrine disruption in its habitat. Atretic oocytes (AO) characterised by the abnormal shape and degeneration of yolk granules and follicular complexes in both PG and SG phases were observed. The AOs were found in all fishes but the ratio was significantly higher in mesopelagic and estuarine fishes compared to other fishes. It is plausible that the mesopelagic and estuarine fishes have poor reproductive health. The results of the study warrant further investigations on water quality associated with the longterm conservation efforts on the marine and estuarine ecosystems of Thailand.

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Item Type:	Article
AGROVOC Term:	Fishes
AGROVOC Term:	Monacanthus chinensis
AGROVOC Term:	Pisodonophis boro
AGROVOC Term:	Habitats
AGROVOC Term:	Histopathology
AGROVOC Term:	Sampling
AGROVOC Term:	Ecosystems
AGROVOC Term:	Estuaries
AGROVOC Term:	Oocytes
AGROVOC Term:	Oogenesis
Depositing User:	Mr. AFANDI ABDUL MALEK
Last Modified:	24 Apr 2025 00:54
URI:	http://webagris.upm.edu.my/id/eprint/9296

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