Search engine for discovering works of Art, research articles, and books related to Art and Culture
Javascript must be enabled to continue!
Reproduction of the cutlassfish Trichiurus lepturus in the southern Brazil subtropical convergence ecosystem
View through CrossRef
The reproduction of the cutlassfish Trichiurus lepturus was studied from samples collected in bottom trawl surveys on the continental shelf and shelf break off southern Brazil. The mean total length (LT) at first gonadal maturity was 63.9 cm for males and 69.3 cm for females. Batch fecundity ranged from 3,917 in a specimen of 70 cm LT to 154,216 in a specimen of 141 cm but the number of spawning batches in each season was not established. Spawning occurs in late spring and summer in the continental shelf and probably year round over the shelf break. High surface temperatures and moderate stratification of the water column were associated with the final stages of gonadal maturation. Seasonal and spatial differences in sex ratios, sizes, maturity stages and feeding intensities suggest that adult female T. lepturus remain during the cold season in the continental shelf of southern Brazil to feed, while adult males move to warmer waters northward or offshore.
Title: Reproduction of the cutlassfish Trichiurus lepturus in the southern Brazil subtropical convergence ecosystem
Description:
The reproduction of the cutlassfish Trichiurus lepturus was studied from samples collected in bottom trawl surveys on the continental shelf and shelf break off southern Brazil.
The mean total length (LT) at first gonadal maturity was 63.
9 cm for males and 69.
3 cm for females.
Batch fecundity ranged from 3,917 in a specimen of 70 cm LT to 154,216 in a specimen of 141 cm but the number of spawning batches in each season was not established.
Spawning occurs in late spring and summer in the continental shelf and probably year round over the shelf break.
High surface temperatures and moderate stratification of the water column were associated with the final stages of gonadal maturation.
Seasonal and spatial differences in sex ratios, sizes, maturity stages and feeding intensities suggest that adult female T.
lepturus remain during the cold season in the continental shelf of southern Brazil to feed, while adult males move to warmer waters northward or offshore.
Related Results
On the circulation of the North Atlantic shadow zone
On the circulation of the North Atlantic shadow zone
Regions isolated from the wind-driven circulation are found in the eastern margins of the world's tropical oceans. The weak and stagnant circulation of these so-called “shadow zone...
Unbounded Star Convergence in Lattices
Unbounded Star Convergence in Lattices
Let L be a vector lattice, "(" x_α ") " be a L-valued net, and x∈L . If |x_α-x|∧u→┴o 0 for every u ∈〖 L〗_+ then it is said that the net "(" x_α ")" unbounded order converges ...
Valuation of Ecosystem Services, Karnataka State, India
Valuation of Ecosystem Services, Karnataka State, India
Humans depend on the environment for their basic needs, such as food, fuel, minerals, water, air, etc. Burgeoning unplanned development activities to cater to the demands of the in...
Convergence des ensembles analytiques et des applications méromorphes
Convergence des ensembles analytiques et des applications méromorphes
L'objectif de cette thèse, est l'étude de la convergence d'applications méromorphes entre deux variétés U et X. D'abord nous rappelons trois types de convergence d'applications mér...
Ecosystem service assessment of green roofs in Bangkok
Ecosystem service assessment of green roofs in Bangkok
Green roofs are constructed ecosystems that can provide four main types of ecosystem services (regulating, provisioning, cultural, and supporting services). However, most green roo...
Impact of local industry expansion on farmland ecosystem services: A case study of farmland-factories in Changhua County, Taiwan
Impact of local industry expansion on farmland ecosystem services: A case study of farmland-factories in Changhua County, Taiwan
<p>As is known to everyone, the preservation of agricultural landscape plays a crucial role in productivity, sustainability and other ecosystem services of agricultur...
Socio-Cultural Approaches to the Anthropology of Reproduction
Socio-Cultural Approaches to the Anthropology of Reproduction
Attention to reproduction within anthropology emerged in early cross-cultural studies, largely descriptive and ethnomedical in nature, that examined reproduction in the context of ...
The major axes of terrestrial ecosystem functions derived from ecosystem scale flux observations
The major axes of terrestrial ecosystem functions derived from ecosystem scale flux observations
<p>Understanding the coordination of ecosystem functions across global biomes is still a critical challenge in ecology to better predict biosphere response to environ...