Effects of Food Concentration and Photoperiod on Egg Production, Female Life Expectancy and Population Dynamics of the Paracalanid Copepod, Bestiolina amoyensis

The paracalanid copepod, Bestiolina amoyensis, is a widely distributed species occurring in subtropical inshore waters across the Pacific Ocean. Its small size, herbivorous feeding habit, and high adaptability make the species one of the most promising candidates as potential live feed for hatchery...

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Autores principales:	Lin Wang, Shuhong Wang, Chaoshu Zeng, Yuyue Wang, Chunxiao Zeng
Formato:	article
Lenguaje:	EN
Publicado:	Frontiers Media S.A. 2021
Materias:	copepod sex ratio productivity live prey algal feeding density Science Q General. Including nature conservation, geographical distribution QH1-199.5
Acceso en línea:	https://doaj.org/article/c97d5be5e9dd4643aea5bd5fffd6e032
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spelling	oai:doaj.org-article:c97d5be5e9dd4643aea5bd5fffd6e0322021-12-01T02:18:42ZEffects of Food Concentration and Photoperiod on Egg Production, Female Life Expectancy and Population Dynamics of the Paracalanid Copepod, Bestiolina amoyensis2296-774510.3389/fmars.2021.788744https://doaj.org/article/c97d5be5e9dd4643aea5bd5fffd6e0322021-11-01T00:00:00Zhttps://www.frontiersin.org/articles/10.3389/fmars.2021.788744/fullhttps://doaj.org/toc/2296-7745The paracalanid copepod, Bestiolina amoyensis, is a widely distributed species occurring in subtropical inshore waters across the Pacific Ocean. Its small size, herbivorous feeding habit, and high adaptability make the species one of the most promising candidates as potential live feed for hatchery larval rearing. This study investigated effects of different feeding density of microalgae Isochrysis spp. (1 × 105, 2 × 105, 3 × 105, 4 × 105, and 5 × 105 cells ml–1) and photoperiod (8L:16D, 12L:12D, and 16L:8D) on productivity-related parameters, including egg production, female life expectancy and population dynamics of B. amoyensis. Results showed that total egg output over female lifespan, final population size and intrinsic rate of population of 12L:12D photoperiod treatments were always the highest among three photoperiod conditions, especially at the food concentration of 4 × 105 cells ml–1, indicating B. amoyensis had high reproductive performance and the population was in a more stable status. The number of nauplii from 4 × 105 cells ml–1 algal concentration treatment accounted for 75% of the population, and the ratio of females to males approaching 1:1 when photoperiod was 12L:12D; female life expectancy was 10.5 ± 0.6 days. In conclusion, our results showed that Isochrysis spp. is a suitable feed for B. amoyensis with an optimal concentration at 4 × 105 cells mL–1; the optimal photoperiod for B. amoyensis rearing is 12L:12D. The relatively long reproductive lifespan and high intrinsic population increase rate make B. amoyensis a good candidate to develop culture techniques for hatchery larval rearing.Lin WangLin WangShuhong WangShuhong WangChaoshu ZengYuyue WangYuyue WangChunxiao ZengChunxiao ZengFrontiers Media S.A.articlecopepodsex ratioproductivitylive preyalgal feeding densityScienceQGeneral. Including nature conservation, geographical distributionQH1-199.5ENFrontiers in Marine Science, Vol 8 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	copepod sex ratio productivity live prey algal feeding density Science Q General. Including nature conservation, geographical distribution QH1-199.5
spellingShingle	copepod sex ratio productivity live prey algal feeding density Science Q General. Including nature conservation, geographical distribution QH1-199.5 Lin Wang Lin Wang Shuhong Wang Shuhong Wang Chaoshu Zeng Yuyue Wang Yuyue Wang Chunxiao Zeng Chunxiao Zeng Effects of Food Concentration and Photoperiod on Egg Production, Female Life Expectancy and Population Dynamics of the Paracalanid Copepod, Bestiolina amoyensis
description	The paracalanid copepod, Bestiolina amoyensis, is a widely distributed species occurring in subtropical inshore waters across the Pacific Ocean. Its small size, herbivorous feeding habit, and high adaptability make the species one of the most promising candidates as potential live feed for hatchery larval rearing. This study investigated effects of different feeding density of microalgae Isochrysis spp. (1 × 105, 2 × 105, 3 × 105, 4 × 105, and 5 × 105 cells ml–1) and photoperiod (8L:16D, 12L:12D, and 16L:8D) on productivity-related parameters, including egg production, female life expectancy and population dynamics of B. amoyensis. Results showed that total egg output over female lifespan, final population size and intrinsic rate of population of 12L:12D photoperiod treatments were always the highest among three photoperiod conditions, especially at the food concentration of 4 × 105 cells ml–1, indicating B. amoyensis had high reproductive performance and the population was in a more stable status. The number of nauplii from 4 × 105 cells ml–1 algal concentration treatment accounted for 75% of the population, and the ratio of females to males approaching 1:1 when photoperiod was 12L:12D; female life expectancy was 10.5 ± 0.6 days. In conclusion, our results showed that Isochrysis spp. is a suitable feed for B. amoyensis with an optimal concentration at 4 × 105 cells mL–1; the optimal photoperiod for B. amoyensis rearing is 12L:12D. The relatively long reproductive lifespan and high intrinsic population increase rate make B. amoyensis a good candidate to develop culture techniques for hatchery larval rearing.
format	article
author	Lin Wang Lin Wang Shuhong Wang Shuhong Wang Chaoshu Zeng Yuyue Wang Yuyue Wang Chunxiao Zeng Chunxiao Zeng
author_facet	Lin Wang Lin Wang Shuhong Wang Shuhong Wang Chaoshu Zeng Yuyue Wang Yuyue Wang Chunxiao Zeng Chunxiao Zeng
author_sort	Lin Wang
title	Effects of Food Concentration and Photoperiod on Egg Production, Female Life Expectancy and Population Dynamics of the Paracalanid Copepod, Bestiolina amoyensis
title_short	Effects of Food Concentration and Photoperiod on Egg Production, Female Life Expectancy and Population Dynamics of the Paracalanid Copepod, Bestiolina amoyensis
title_full	Effects of Food Concentration and Photoperiod on Egg Production, Female Life Expectancy and Population Dynamics of the Paracalanid Copepod, Bestiolina amoyensis
title_fullStr	Effects of Food Concentration and Photoperiod on Egg Production, Female Life Expectancy and Population Dynamics of the Paracalanid Copepod, Bestiolina amoyensis
title_full_unstemmed	Effects of Food Concentration and Photoperiod on Egg Production, Female Life Expectancy and Population Dynamics of the Paracalanid Copepod, Bestiolina amoyensis
title_sort	effects of food concentration and photoperiod on egg production, female life expectancy and population dynamics of the paracalanid copepod, bestiolina amoyensis
publisher	Frontiers Media S.A.
publishDate	2021
url	https://doaj.org/article/c97d5be5e9dd4643aea5bd5fffd6e032
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Effects of Food Concentration and Photoperiod on Egg Production, Female Life Expectancy and Population Dynamics of the Paracalanid Copepod, Bestiolina amoyensis

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