Banca de DEFESA: JEANE CAMPOS SILVA

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : JEANE CAMPOS SILVA
DATE: 26/07/2022
TIME: 14:00
LOCAL: Metapresencial- http://meet.google.com/xyw-cnav-eou
TITLE:

Age, growth and larval duration of three species of lutjanids in the Abrolhos National Marine Park, Bahia - Ba

KEY WORDS:

reef fish; reds; early stages; daily increments of otolith growth; fish larval growth

PAGES: 58
BIG AREA: Ciências Humanas
AREA: Educação
SUMMARY:

Age and daily growth are recorded by deposition of increments in fish otoliths. Otoliths are concretions formed by the precipitation of substances present in the endolymphatic fluid, mainly calcium carbonate (CaCO3). Faced with the need to fill in some gaps in knowledge about the occurrence and duration of the early stages of the life cycle for the species of red in the thistle bank, the objective of this work was to describe what are the growth rates, age and duration period. pelagic larvae of three species of Lutjanideos during the larval pre-settlement phase, in the region of Banco dos Abrolhos. Post-larvae capture was performed with CARE® type light traps. In the Marine Ecology and Conservation laboratory the samples were measured, weighed, identified and dissected. The pair of lapilii otoliths were extracted, embedded in epoxy resin and photographed using a stereoscopic microscope with transmitted and polarized light (magnification 100x and 400x) coupled to a camera (Motic) with Motic 3.1 software for age estimation with counting increments of growth. To ensure accuracy in age estimation, three independent replicated readings of daily increments were performed from cross sections of the otoliths. 153 larvae of the 3 species of red were identified and dissected to remove the otoliths, 117 specimens had their otoliths removed “without apparent damage and after the thinning procedure 69 otoliths were viable to estimate the age, being 15 L. analis, 25 from L. .jocu, and 29 L. synagris. The family presented sizes (CT) between 16.14 mm – 24.76 mm, lapilli otolith radius between 55.51 μm – 106.58 μm, total age of individuals at capture between 21 and 39 days. Settlement marks were found for the three species and the average PLD for L. analis was 24 days (PAB) and 26 days (AB), L. jocu was 25 days (AB) and 26 days (PAB) and for L. synagris 27 days (AB) and 24 days (PAB). Two lunar phases were predominant for the birth of the analyzed individuals, these being the full moon and the waning moon, regardless of the species. The results indicate a strong relationship between the species and the lunar periodicity in spawning. The settlement marks in the three species (L. analis, L. jocu and L. synagris) indicate that the species have found in the reefs the necessary conditions to settle, contradicting the expectations of dependence on estuaries and evidencing a certain plasticity in the use of the habitat. by the species.

BANKING MEMBERS:
Externo à Instituição - JOHNATHA ADELIR ALVES - UFPR
Presidente - 1147286 - FABIANA CEZAR FELIX HACKRADT
Interno - 1041340 - LEONARDO EVANGELISTA MORAES
Interno - 1563747 - MARCOS EDUARDO CORDEIRO BERNARDES