scholarly journals Length–weight relationships for estuarine fishes in subtropical estuary

2020 ◽  
Vol 42 ◽  
pp. e51495
Author(s):  
Barbara Maichak de Carvalho ◽  
Renato Bot ◽  
Henry Louis Spach
Keyword(s):  
Sampling Methods ◽  
Weight Ratio ◽  
Growth Patterns ◽  
Southwestern Atlantic ◽  
Southern Brazil ◽  
Allometric Growth ◽  
Intertidal Area ◽  
Beach Seine ◽  
Estuarine Fishes ◽  
Subtropical Estuary

The present study describes the length/weight ratio (LWR) of 20 fish species caught in an intertidal area of the Paranaguá Estuarine Complex, southern Brazil. Fish were caught with three beach seine nets, with 2m high, 70m long and distance between knots of 2.5; 4 and 5cm. A total of 880 individuals of 21 species belonging to 11 families were captured, ranging from 5 to 75.5cm in total length. All species analyzed are widely distributed throughout the Southwestern Atlantic. Positive allometric growth (b > 3) was predominant, occurring in 60% species, 35% presented negative allometry (b < 3) and only 5% had isometric growth (b = 3). Many factors could be influencing the distinct growth patterns observed between the literature and the present study, such as the environmental influences, the reduced number of specimens, the sampling methods, the sampling periods and the estimation of the LWR with grouped sexes.

scholarly journals Abundance and demography of bottlenose dolphins inhabiting a subtropical estuary in the Southwestern Atlantic Ocean

2015 ◽  
Vol 96 (2) ◽  
pp. 332-343 ◽  
Author(s):  
Pedro F. Fruet ◽  
Fábio G. Daura-Jorge ◽  
Luciana M. Möller ◽  
Rodrigo Cezar Genoves ◽  
Eduardo R. Secchi
Keyword(s):  
Atlantic Ocean ◽  
Bottlenose Dolphins ◽  
Southwestern Atlantic ◽  
Southwestern Atlantic Ocean ◽  
Subtropical Estuary

scholarly journals Allometric growth patterns in hatchery-reared larvae of the catfish Lophiosilurus alexandri (Pisces: Pseudopimelodidae)

2014 ◽  
Vol 66 (1) ◽  
pp. 284-288 ◽  
Author(s):  
R.J. Guimarães-Cruz ◽  
V.C. Veloso-Júnior ◽  
N.G. Sales ◽  
D.A.A. Oliveira ◽  
J.E. Santos
Keyword(s):  
Standard Length ◽  
Growth Analysis ◽  
Body Height ◽  
Growth Patterns ◽  
Head Length ◽  
Allometric Growth ◽  
Positive Relation ◽  
Initial Development ◽  
Eye Diameter ◽  
Head Height

The aim of the present study was to characterize the relationships that occur between morphometric variables of larvae of Lophiosilurus alexandri Steindachner, 1876 through their allometric growth analysis. Total length, head length and body height were correlated with standard length, head height and body height, as well as eye diameter and head height with head length. The results revealed allometric positive relation during the initial development, where the b coefficient varied between 1.10 and 2.81. The variable pre-anal distance in relation to the standard length and the snout length in relation to the head length revealed an allometric negative relation, where the b coefficient was 0.85 and 0.94, respectively.

scholarly journals Length-weight relationship of Threadfin Bream (Nemipterus sp.) in Village Malang Rapat Waters, Bintan Regency, Riau Island

2020 ◽  
Vol 13 (2) ◽  
pp. 449
Author(s):  
Rapita Rapita ◽  
Susiana Susiana ◽  
Rochmady Rochmady
Keyword(s):  
Growth Patterns ◽  
Allometric Growth ◽  
Fish Resources ◽  
Weight Relationship ◽  
Relationship Of

Village Malang Rapat waters are have the potential and habitat of kurisi fish resources (Nemipterus sp.). The research was to determine the length-weight relationship of kurisi fish (Nemipterus sp.) in Village Malang Rapat. Sampling of kurisi fish (Nemipterus sp.) in two months (October-November 2020) is taken once a week based on fishing grounds and habitat. Length-weight relationship of female and male kurisi fish (Nemipterus sp.) were y = 1,1568x2,0659 and y = 1,2123x1,8971 respectively, based on this value show that female and male kurisi fish (Nemipterus sp.) in Village Malang Rapat waters have negative allometric growth patterns (b < 3).

scholarly journals Spatial and temporal differences in the fish assemblage structure in a subtropical estuary

2020 ◽  
Vol 48 (1) ◽  
pp. 74-84
Author(s):  
André P. Cattani ◽  
Gisela C. Ribeiro ◽  
Mauricio Hostim-Silva ◽  
Marcelo Soeth ◽  
Leandro Clezar ◽  
...  
Keyword(s):  
Food Availability ◽  
Fish Assemblage ◽  
Spatial Dynamics ◽  
River Estuary ◽  
Fish Assemblage Structure ◽  
Southern Brazil ◽  
Pomatomus Saltatrix ◽  
Subtropical Estuary ◽  
Micropogonias Furnieri ◽  
Temporal And Spatial

A large number of fish species use the mangrove mainly due to food availability and protection against predators. The knowledge of temporal and spatial dynamics of ichthyofauna allows us to identify patterns of occupation of this ecosystem and to support the assessment and preservation of local biodiversity. In this sense, samplings were conducted in 1988 at five areas of the Itacorubi River estuary, Santa Catarina Island. A total of 3,883 specimens were collected, distributed in 21 families and 41 species with the predominance of Cetengraulis edentulus, Mugil liza, Mugil curema, Genidens genidens, Mugil gaimardianus, Eucinostomus gula, Micropogonias furnieri, Pomatomus saltatrix and Sphoeroides testudineus. On average, abundances differed between seasons and sampled areas. Differences were detected between the fish faunas of fall and winter compared to summer and spring and between sampling sites. This study identified a fish assemblage in the mangrove of the Itacorubi River with a similar structure to other estuaries of southern Brazil.

scholarly journals Allometric Growth Patterns of Fine Scale Fish Larvae and Its Ecological Significance

2020 ◽  
Vol 1575 ◽  
pp. 012157
Author(s):  
Guiqiang Yang ◽  
Zhanquan Wang ◽  
Jie He ◽  
Wentong Li ◽  
Ding Yuan
Keyword(s):  
Fish Larvae ◽  
Growth Patterns ◽  
Fine Scale ◽  
Ecological Significance ◽  
Allometric Growth

scholarly journals New records of Hippocampus patagonicus Piacentino & Luzzatto, 2004 (Teleostei: Syngnathidae) from the coast of Paraná, southern Brazil

Check List ◽  
2016 ◽  
Vol 12 (1) ◽  
pp. 1822
Author(s):  
Luci F. Pereira ◽  
Rosana B. Silveira ◽  
Vinícius Abilhoa
Keyword(s):  
New Records ◽  
Conservation Strategies ◽  
Brazilian Coast ◽  
Southwestern Atlantic ◽  
Southern Brazil ◽  
Incidental Capture ◽  
Additional Information ◽  
Trawl Fishery ◽  
Shrimp Trawl ◽  
Management And Conservation

Abstract: The seahorse Hippocampus patagonicus (Teleostei: Syngnathidae) is the southernmost occurring species of its genus in the South Atlantic Ocean. Its distribution seems to be restricted to the Southwestern Atlantic, along the coasts of Argentina and Brazil. Herein we report the incidental capture of six individuals as bycatch in the shrimp trawl fishery off the coast of Paraná, southern Brazil. Additional information on the geographic distribution of H. patagonicus, together with its ecology and life history, is important for conservation of this threatened species. These data can promote the development of appropriate management and conservation strategies for populations along the Brazilian coast. 

Pectinariidae (Annelida, Terebelliformia) from off southeastern Brazil, southwestern Atlantic

Zootaxa ◽  
2019 ◽  
Vol 4571 (4) ◽  
pp. 489
Author(s):  
JOÃO MIGUEL DE MATOS NOGUEIRA ◽  
WILLIAM M. G. RIBEIRO ◽  
ORLEMIR CARRERETTE ◽  
PAT HUTCHINGS
Keyword(s):  
New Record ◽  
First Record ◽  
Southeastern Brazil ◽  
Brazilian Coast ◽  
Nomen Nudum ◽  
Southwestern Atlantic ◽  
Southern Brazil ◽  
Ecological Studies ◽  
Unpublished Thesis ◽  
A New Species

Two of the species of Pectinariidae previously reported from the Brazilian coast are herein described, together with a new species and also new record for the genus Petta Malmgren, 1866 for the southern Atlantic. Amphictene catharinensis (Grube, 1870) was described from material from off Santa Catarina, southern Brazil, but the most recent description for these animals comes from Nilsson (1928); a redescription for A. catharinensis is herein provided. Pectinaria nonatoi n. sp. was informally described as P. (Pectinaria) laelia nomen nudum in an unpublished thesis and a formal description has never been provided, although the species has been reported from several other localities off the Brazilian shoreline, mostly in ecological studies; the species is formally described herein and compared to the most similar congeners. Petta alissoni n. sp. is also described and compared to the most similar congeners and this is the first record for animals of this genus from southern Atlantic. There are also records for Pectinaria gouldii (Verrill, 1874) and P. regalis Verrill, 1901 from off the Brazilian coast, and a doubtful record for Lagis pseudokoreni (Day, 1955), but we did not find any material belonging to those taxa. 

scholarly journals Allometric Growth Patterns of Body and Carcass Components in Ardhi Goat

2013 ◽  
Vol 5 (5) ◽  
pp. 183-189 ◽  
Author(s):  
A. Al-Owaimer ◽  
G. Suliman ◽  
A. El-Waziry ◽  
H. Metwally ◽  
M. Abouheif
Keyword(s):  
Growth Patterns ◽  
Allometric Growth

Growth Patterns of the Rabbit Masticatory Muscles

1990 ◽  
Vol 69 (1) ◽  
pp. 20-25 ◽  
Author(s):  
G.E.J. Langenbach ◽  
W.A. Weijs
Keyword(s):  
Fiber Length ◽  
Masticatory Muscles ◽  
Growth Patterns ◽  
Weight Increase ◽  
Allometric Growth ◽  
Muscle Weight ◽  
Temporal Muscle ◽  
Functional Relationships ◽  
Facial Skull ◽  
Total Muscle

The post-natal growth of the masticatory muscles in the rabbit was examined. By means of anatomical dissection and measurement, total muscle length, muscle fiber length, and muscle weight were determined in animals varying in age between one week and 36 months and exhibiting a 50-fold weight increase. Growth data were fitted by linear regression models with facial skull length used as the independent variable. Many deviations occur from size-dependent isometric growth. The muscles can be divided into three groups, according to their pattern of weight increase: The jaw openers grow negatively allometrically, and their contribution to total muscle weight decreases with time; the temporal muscle grows negatively allometrically but its relative weight proportion remains about the same; the masseter and medial pterygoid muscles have positively allometric growth, and their contribution to total muscle weight increases strongly. Generally, the length of the muscles and of their fibers increases at lower rates than does the length of the facial skull. After weaning, the rate of longitudinal growth drops steeply in some muscles. Total fiber area or physiological cross-section (PCS) of muscles is computed from weight and fiber length. It increases positively allometrically in the jaw closers and negatively allometrically in the jaw openers. In the lateral pterygoid muscle, the increase of PCS changes from negatively- to positively-allometric growth after weaning. The study demonstrates that individual oral muscles follow different patterns of longitudinal and cross-sectional growth, so that their functional capacities (force, range of contraction) and mutual functional relationships are age-dependent.

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