Reproductive biology and female parental care in the cockscomb prickleback, Anoplarchus purpurescens (Pisces: Stichaeidae)

1992 ◽  
Vol 35 (2) ◽  
pp. 177-186 ◽  
Author(s):  
Ronald M. Coleman
Keyword(s):  
Parental Care ◽  
Reproductive Biology ◽  
Anoplarchus Purpurescens

scholarly journals Aggregations and parental care in the Early Triassic basal cynodontsGalesaurus planicepsandThrinaxodon liorhinus

PeerJ ◽  
2017 ◽  
Vol 5 ◽  
pp. e2875 ◽  
Author(s):  
Sandra C. Jasinoski ◽  
Fernando Abdala
Keyword(s):  
Parental Care ◽  
Reproductive Biology ◽  
Fossil Record ◽  
Size Difference ◽  
Early Triassic ◽  
Adult Size ◽  
Extensive Survey ◽  
Comprehensive Survey ◽  
Extinct Group ◽  
Mixed Age

Non-mammaliaform cynodonts gave rise to mammals but the reproductive biology of this extinct group is still poorly known. Two exceptional fossils ofGalesaurus planicepsandThrinaxodon liorhinus, consisting of juveniles closely associated with an adult, were briefly described more than 50 years ago as examples of parental care in non-mammaliaform cynodonts. However, these two Early Triassic fossils have largely been excluded from recent discussions of parental care in the fossil record. Here we re-analyse these fossils in the context of an extensive survey of other aggregations found in these two basal cynodont taxa. Our analysis revealed six other unequivocal cases of aggregations inThrinaxodon, with examples of same-age aggregations among immature or adult individuals as well as mixed-age aggregations between subadult and adult individuals. In contrast, only one additional aggregation ofGalesauruswas identified. Taking this comprehensive survey into account, the two previously described cases of parental care inGalesaurusandThrinaxodonare substantiated. The juveniles are the smallest specimens known for each taxon, and the size difference between the adult and the two associated juveniles is the largest found for any of the aggregations. The juveniles ofThrinaxodonare approximately only 37% of the associated adult size; whereas inGalesaurus, the young are at least 60% of the associated adult size. In each case, the two juvenile individuals are similar in size, suggesting they were from the same clutch. Even though parental care was present in bothGalesaurusandThrinaxodon, intraspecific aggregations were much more common inThrinaxodon, suggesting it regularly lived in aggregations consisting of both similar and different aged individuals.

scholarly journals Reproductive biology of a bromeligenous frog endemic to the Atlantic Forest: Aparasphenodon arapapa Pimenta, Napoli and Haddad, 2009 (Anura: Hylidae)

2014 ◽  
Vol 86 (2) ◽  
pp. 867-880 ◽  
Author(s):  
AMANDA S.F. LANTYER-SILVA ◽  
MIRCO SOLÉ ◽  
JULIANA ZINA
Keyword(s):  
South America ◽  
Parental Care ◽  
Reproductive Biology ◽  
Atlantic Forest ◽  
Courtship Behavior ◽  
Reproductive Mode ◽  
Breeding Site ◽  
Male And Female

The genus Aparasphenodon is restricted to South America and comprises five poorly studied species which present a straight relationship with bromeliads. Herein we present the reproductive biology of the species Aparasphenodon arapapa. Our observations indicate that A. arapapa is a prolonged breeder, reproducing throughout the year using bromeliads as a calling and breeding site. The tadpoles complete their development inside those plants. Males, females and juveniles may also use the bromeliads as a shelter. We also describe the courtship behavior and the parental care of the species with an evidence of temporary fidelity between male and female and propose a new reproductive mode.

Reproductive variables of Hypleurochilus fissicornis (Quoy & Gaimard, 1824) (Pisces: Blenniidae) on rocky intertidal zones in the South-western Atlantic

2021 ◽  
pp. 1-10
Author(s):  
Sergio M. Delpiani ◽  
Daniel O. Bruno ◽  
María I. Militelli ◽  
Fabián H. Acuña ◽  
Juan M. Díaz de Astarloa ◽  
...  
Keyword(s):  
Parental Care ◽  
Reproductive Biology ◽  
Condition Factor ◽  
Rocky Intertidal ◽  
Resident Species ◽  
Monthly Basis ◽  
Western Atlantic ◽  
Intertidal Zones ◽  
First Maturity ◽  
Size At First Maturity

Abstract Hypleurochilus fissicornis is a resident species of the intertidal and subtidal zones of Mar del Plata, Argentina. The specific reproductive biology was studied by means of both microscopic and macroscopic analyses. A total of 212 males and 223 females were analysed. Specimens were dissected and their gonads and livers were removed. The gonadosomatic and hepatosomatic indexes and the condition factor were calculated on a monthly basis. Hypleurochilus fissicornis breeds in rocky intertidal areas, and exhibits low fecundity with benthic eggs and parental care. Size at first maturity (L50) was estimated at 53.66 and 55.83 mm total length for females and males, respectively. The spawning season takes place between December and April.

scholarly journals Sexual dimorphism in the catfish Genidens genidens (Siluriformes: Ariidae) based on otolith morphometry and relative growth

2019 ◽  
Vol 17 (1) ◽  
Author(s):  
Thaís Rodrigues Maciel ◽  
André Martins Vaz-dos-Santos ◽  
José Ricardo de Souza Barradas ◽  
Marcelo Vianna
Keyword(s):  
Population Dynamics ◽  
Sexual Dimorphism ◽  
Parental Care ◽  
Reproductive Biology ◽  
Somatic Growth ◽  
Life Cycles ◽  
Growth Patterns ◽  
Population Declines ◽  
Otolith Growth ◽  
Relative Growth

ABSTRACT Genidens genidens is a species susceptible to population declines in view of their reproductive biology peculiarities. Morphometric differences between sexes are observed in the literature, and these differences should also be evident in otolith development. Growth patterns are one of the most important biological characteristics regarding population dynamics and management. In this context, the aim of the present study is to describe this species relative growth and identify differences between sex life cycles. Somatic growth-otolith growth relationships and somatic length-weight relationships were estimated based on two methodologies; the Huxley and the polyphasic allometric models. Both models demonstrated different growth patterns between sexes. The three axes of otolith growth were adequate descriptors of growth, and the results of the Huxley model demonstrated distinct growth patterns between sexes, with male otoliths larger in all three measured axes. In the polyphase model, male otoliths were thicker, while female otoliths were longer and higher. Both sexes presented similar length-weight relationships, which may indicate that oocyte production and parental care lead to similar costs for this species.

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