Consulta: subjectFacets:"Early life"
Registros recuperados: 3
Data/hora: 09/06/2024 04:41:01

High mortality rates in a juvenile free‐ranging marine predator and links to dive and forage ability
Provedor de dados: 5
Autores: Cox, Samantha; Authier, Matthieu; Orgeret, Florian; Weimerskirch, Henri; Guinet, Christophe.
High juvenile mortality rates are typical of many long‐lived marine vertebrate predators. Insufficient development in dive and forage ability is considered a key driver of this. However, direct links to survival outcome are sparse, particularly in free‐ranging marine animals that may not return to land. In this study, we conduct exploratory investigations toward early mortality in juvenile southern elephant seals Mirounga leonina. Twenty postweaning pups were equipped with (a) a new‐generation satellite relay data tag, capable of remotely transmitting fine‐scale behavioral movements from accelerometers, and (b) a location transmitting only tag (so that mortality events could be distinguished from device failures). Individuals were followed during their...
Tipo: Text
Palavras-chave: Bio-logging; Early life; Foraging ecology; Juvenile mortality; Mirounga leonina; Southern elephant seal; Survival analyses.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00598/71016/69289.pdf

Mechanistic Morphogenesis of Organo-Sedimentary Structures Growing Under Geochemically Stressed Conditions: Keystone to Proving the Biogenicity of Some Archaean Stromatolites?
Provedor de dados: 5
Autores: Hickman-lewis, Keyron; Gautret, Pascale; Arbaret, Laurent; Sorieul, Stéphanie; De Wit, Rutger; Foucher, Frédéric; Cavalazzi, Barbara; Westall, Frances.
Morphologically diverse organo-sedimentary structures (including microbial mats and stromatolites) provide a palaeobiological record through more than three billion years of Earth history. Since understanding much of the Archaean fossil record is contingent upon proving the biogenicity of such structures, mechanistic interpretations of well-preserved fossil microbialites can reinforce our understanding of their biogeochemistry and distinguish unambiguous biological characteristics in these structures, which represent some of the earliest records of life. Mechanistic morphogenetic understanding relies upon the analysis of geomicrobiological experiments. Herein, we report morphological-biogeochemical comparisons between micromorphologies observed in growth...
Tipo: Text
Palavras-chave: Microbial mat; Stromatolite; Anoxygenic photosynthesis; X-ray micro-scale computed tomography; Archaean; Early life; Dresser Formation; Middle Marker horizon.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00512/62323/66580.pdf

Allometric larval growth of the bottom-dwelling catfish Lophiosilurus alexandri Steindachner, 1876 (Siluriformes: Pseudopimelodidae)
Provedor de dados: 83
Autores: Mello,Gabriel Caetano Guimarães de; Santos,José Enemir dos; Guimarães-Cruz,Rodrigo José; Godinho,Alexandre Lima; Godinho,Hugo Pereira.
ABSTRACT We investigated the early life growth pattern of pacamã, Lophiosilurus alexandri , a catfish endemic to the rio São Francisco basin, Brazil. Pacamã larvae were kept in a galvanized trough for 29 days after hatching. We collected approximately 10 larvae daily (total number = 285). We obtained from each specimen the total length (independent variable) and 11 other body measurements (dependent variables). We performed linear regressions on the log-transformed data to determine the growth pattern of the body measurements and the respective inflexion point on the growth curves. Except for trunk length, trunk width and yolk sac volume, the remaining body measurements showed a positive allometric growth coefficient up to the respective IP followed by a...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Early life; Fish rearing; Larval development; Pacamã; Rio São Francisco.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252015000400677