Impact of thermal variation on the naupliar development of the copepod Apocyclops spartinus (Ruber, 1968) (Copepoda: Cyclopidae), under controlled conditions
ABSTRACT Apocyclops spartinus is a subtropical resilient copepod from impacted Peruvian wetlands, widely used for marine fish larviculture and conserved as a strain at Instituto del Mar del Peru - IMARPE. This study was conducted to test the effects of three thermal conditions (16, 20 and 24 ºC) on...
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Sociedade Brasileira de Carcinologia
2025-02-01
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| Series: | Nauplius |
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| author | Pedro Pablo Alonso Sánchez-Dávila Ruth Milagros Alejos-Cabrera Wilmer Gaspar-Reyes Jhon Dionicio-Acedo |
| author_facet | Pedro Pablo Alonso Sánchez-Dávila Ruth Milagros Alejos-Cabrera Wilmer Gaspar-Reyes Jhon Dionicio-Acedo |
| author_sort | Pedro Pablo Alonso Sánchez-Dávila |
| collection | DOAJ |
| description | ABSTRACT Apocyclops spartinus is a subtropical resilient copepod from impacted Peruvian wetlands, widely used for marine fish larviculture and conserved as a strain at Instituto del Mar del Peru - IMARPE. This study was conducted to test the effects of three thermal conditions (16, 20 and 24 ºC) on the individual growth of conditioned nauplii. Sub-stage growth rates, three growth models and three growth rate-dependent models were evaluated. Considering these previous experiments, naupliar growth retardation and mortality were evaluated for cold shock stress (8 ºC lower). Results indicated a progressive increase in development time by reducing temperature from 24 to 20 ºC (1.75 times) and 20 to 16 ºC (4 times). Growth rates showed a tendency to decrease, prior to metamorphosis and independent of temperature. Gompertz was the best growth model by describing sigmoidal tendency of naupliar development. Arrhenius was the best growth rate-dependent model but slightly better supported than a simple allometric model. Naupliar growth retardation was noted in nauplii that were initially hatched at 24 ºC and then swiftly transferred to a culture at 16 ºC. This cold shock stress resulted in high mortality from day four onwards. In summary, A. spartinus nauplii exhibit potential as a live food source and it is recommended that targeted thermal treatments be employed to extend the time of optimal nauplii size and thereby enhance culture techniques of this species. |
| format | Article |
| id | doaj-art-010a9690d4f64fedb308eabc4aa381da |
| institution | Kabale University |
| issn | 2358-2936 |
| language | English |
| publishDate | 2025-02-01 |
| publisher | Sociedade Brasileira de Carcinologia |
| record_format | Article |
| series | Nauplius |
| spelling | doaj-art-010a9690d4f64fedb308eabc4aa381da2025-02-04T07:42:39ZengSociedade Brasileira de CarcinologiaNauplius2358-29362025-02-013310.1590/2358-2936e20250537Impact of thermal variation on the naupliar development of the copepod Apocyclops spartinus (Ruber, 1968) (Copepoda: Cyclopidae), under controlled conditionsPedro Pablo Alonso Sánchez-Dávilahttps://orcid.org/0000-0002-9913-9832Ruth Milagros Alejos-Cabrerahttps://orcid.org/0000-0002-9919-2078Wilmer Gaspar-Reyeshttps://orcid.org/0000-0002-6839-8102Jhon Dionicio-Acedohttps://orcid.org/0000-0002-1648-2927ABSTRACT Apocyclops spartinus is a subtropical resilient copepod from impacted Peruvian wetlands, widely used for marine fish larviculture and conserved as a strain at Instituto del Mar del Peru - IMARPE. This study was conducted to test the effects of three thermal conditions (16, 20 and 24 ºC) on the individual growth of conditioned nauplii. Sub-stage growth rates, three growth models and three growth rate-dependent models were evaluated. Considering these previous experiments, naupliar growth retardation and mortality were evaluated for cold shock stress (8 ºC lower). Results indicated a progressive increase in development time by reducing temperature from 24 to 20 ºC (1.75 times) and 20 to 16 ºC (4 times). Growth rates showed a tendency to decrease, prior to metamorphosis and independent of temperature. Gompertz was the best growth model by describing sigmoidal tendency of naupliar development. Arrhenius was the best growth rate-dependent model but slightly better supported than a simple allometric model. Naupliar growth retardation was noted in nauplii that were initially hatched at 24 ºC and then swiftly transferred to a culture at 16 ºC. This cold shock stress resulted in high mortality from day four onwards. In summary, A. spartinus nauplii exhibit potential as a live food source and it is recommended that targeted thermal treatments be employed to extend the time of optimal nauplii size and thereby enhance culture techniques of this species.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0104-64972025000100201&lng=en&tlng=enCopepodcold stressgrowth modelgrowth ratenaupliar measurements |
| spellingShingle | Pedro Pablo Alonso Sánchez-Dávila Ruth Milagros Alejos-Cabrera Wilmer Gaspar-Reyes Jhon Dionicio-Acedo Impact of thermal variation on the naupliar development of the copepod Apocyclops spartinus (Ruber, 1968) (Copepoda: Cyclopidae), under controlled conditions Nauplius Copepod cold stress growth model growth rate naupliar measurements |
| title | Impact of thermal variation on the naupliar development of the copepod Apocyclops spartinus (Ruber, 1968) (Copepoda: Cyclopidae), under controlled conditions |
| title_full | Impact of thermal variation on the naupliar development of the copepod Apocyclops spartinus (Ruber, 1968) (Copepoda: Cyclopidae), under controlled conditions |
| title_fullStr | Impact of thermal variation on the naupliar development of the copepod Apocyclops spartinus (Ruber, 1968) (Copepoda: Cyclopidae), under controlled conditions |
| title_full_unstemmed | Impact of thermal variation on the naupliar development of the copepod Apocyclops spartinus (Ruber, 1968) (Copepoda: Cyclopidae), under controlled conditions |
| title_short | Impact of thermal variation on the naupliar development of the copepod Apocyclops spartinus (Ruber, 1968) (Copepoda: Cyclopidae), under controlled conditions |
| title_sort | impact of thermal variation on the naupliar development of the copepod apocyclops spartinus ruber 1968 copepoda cyclopidae under controlled conditions |
| topic | Copepod cold stress growth model growth rate naupliar measurements |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0104-64972025000100201&lng=en&tlng=en |
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