Scholarlink

<p>The present study investigates the spawning behaviour and embryonic development of the monotypic brackishwater goby <i>Mangarinus waterousi</i>, alongside evaluating reproductive performance under varying salinity conditions (10, 20, and 30 ppt). Wild-caught specimens (35–45&#xa0;mm) from the Muttukadu estuarine system were acclimated and conditioned in captive systems. Both males and females exhibited a tendency to remain within the provided substratum during the breeding period. Eggs were adhesive, polylecithal, oval-to-pear-shaped, and yellow-orange in colour, measuring 1.336 ± 0.04&#xa0;mm in length and 0.38 ± 0.09&#xa0;mm in width. Embryonic development followed cleavage and embryonic phases, with hatching occurring after 90.13 ± 0.15&#xa0;h post-fertilisation. Reproductive performance was significantly influenced by salinity. Peak fecundity (1395 ± 33.43 eggs), hatching success (96.33 ± 1.53%), larval survival (26.33 ± 1.53%), and shortest inter-spawning interval (10.67 ± 1.15 days) were recorded at 20 ppt, indicating it as the optimal salinity for breeding. In contrast, elevated salinity (30 ppt) resulted in reduced fecundity (501.33 ± 20.5 eggs), prolonged spawning interval (28.33 ± 1.53 days), and lower larval survival (9.33 ± 1.53%). Egg morphometry showed minimal variation across treatments. Larvae fully metamorphosed by 60 days post-hatch, supported by a mixed trophic diet transitioning from ciliates (<i>Euplotes</i> sp.) and rotifers (<i>Brachionus plicatilis</i>) to copepods (<i>Pseudodiaptomus annandalei</i>, <i>Oithona rigida</i>) and <i>Artemia</i> nauplii. This is the first report of successful captive breeding and a standardized larval rearing protocol of <i>M. waterousi</i>, providing essential baseline reproductive data relevant to species-level conservation and reduced dependence on wild collection.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Reproductive behaviour, effects of salinity on reproductive performance, embryonic development, and larval rearing of the ornamental brackishwater goby, Mangarinus waterousi (Herre, 1943)

  • 期刊论文

  • 发表日期：

    2026年4月9日

查看全文
  • Ezhil P.,
  • Dani Thomas,
  • Sandeep K. P.,
  • J. Raymond J. A.,
  • Geo Ben Kuriakose,
  • Thiagarajan G.,
  • Subburaj R.,
  • Kailasam M.,
  • Kuldeep K. Lal

摘要

The present study investigates the spawning behaviour and embryonic development of the monotypic brackishwater goby Mangarinus waterousi, alongside evaluating reproductive performance under varying salinity conditions (10, 20, and 30 ppt). Wild-caught specimens (35–45 mm) from the Muttukadu estuarine system were acclimated and conditioned in captive systems. Both males and females exhibited a tendency to remain within the provided substratum during the breeding period. Eggs were adhesive, polylecithal, oval-to-pear-shaped, and yellow-orange in colour, measuring 1.336 ± 0.04 mm in length and 0.38 ± 0.09 mm in width. Embryonic development followed cleavage and embryonic phases, with hatching occurring after 90.13 ± 0.15 h post-fertilisation. Reproductive performance was significantly influenced by salinity. Peak fecundity (1395 ± 33.43 eggs), hatching success (96.33 ± 1.53%), larval survival (26.33 ± 1.53%), and shortest inter-spawning interval (10.67 ± 1.15 days) were recorded at 20 ppt, indicating it as the optimal salinity for breeding. In contrast, elevated salinity (30 ppt) resulted in reduced fecundity (501.33 ± 20.5 eggs), prolonged spawning interval (28.33 ± 1.53 days), and lower larval survival (9.33 ± 1.53%). Egg morphometry showed minimal variation across treatments. Larvae fully metamorphosed by 60 days post-hatch, supported by a mixed trophic diet transitioning from ciliates (Euplotes sp.) and rotifers (Brachionus plicatilis) to copepods (Pseudodiaptomus annandalei, Oithona rigida) and Artemia nauplii. This is the first report of successful captive breeding and a standardized larval rearing protocol of M. waterousi, providing essential baseline reproductive data relevant to species-level conservation and reduced dependence on wild collection.