Observations on the habits and morphology of the sea snake Laticauda colubrina (Schneider) in Fiji

1977 ◽  
Vol 55 (10) ◽  
pp. 1612-1619 ◽  
Author(s):  
J. C. Pernetta
Keyword(s):  
Sexual Dimorphism ◽  
Colour Pattern ◽  
Morphometric Characters ◽  
Sea Snake ◽  
Reproductive Characteristics ◽  
Black And White ◽  
Fiji Islands ◽  
Laticauda Colubrina

Fifty specimens of Laticauda colubrina were collected from two localities in the Fiji Islands and variation in a number of nonmetric and morphometric characters recorded. Marked sexual dimorphism is apparent in all characters examined. Details of the habits, diet (reef eels), and reproductive characteristics of this species are given. The function of the black and white banded colour pattern is discussed, and the validity of the currently recognized species of Laticauda is examined.

Oviparity in a Sea-Snake (Laticauda colubrina)

Nature ◽  
1930 ◽  
Vol 126 (3174) ◽  
pp. 312-313 ◽  
Author(s):  
NORMAN SMEDLEY
Keyword(s):  
Sea Snake ◽  
Laticauda Colubrina

scholarly journals Morphometric characters and their relationship in estuarine catfish

1970 ◽  
Vol 6 (2) ◽  
pp. 349-353 ◽  
Author(s):  
M Begum ◽  
Abdullah Al-Mamun ◽  
ML Islam ◽  
MJ Alam
Keyword(s):  
Sexual Dimorphism ◽  
Linear Relationship ◽  
Standard Length ◽  
Head Length ◽  
Pectoral Fin ◽  
Morphometric Characters ◽  
Total Length ◽  
Length Standard ◽  
Eye Diameter ◽  
Males And Females

The morphometric observations were made on total length, standard length, pre-caudal length, head length, eye diameter and depth of body at pectoral fin base of estuarine catfish M. gulio. Males and females showed homogeneity in characters. A linear relationship was found between total length and morphometric characters. Regression of length and weight did not deviate significantly from cube law indicating isometric growth. The fish exhibited sexual dimorphism. Keywords: Morphometric characters; Estuarine catfish; Mystus gulio DOI: 10.3329/jbau.v6i2.4833 J. Bangladesh Agril. Univ. 6(2): 349-353, 2008

Hydrophis donaldi (Elapidae, Hydrophiinae), a highly distinctive new species of sea snake from northern Australia

Zootaxa ◽  
2012 ◽  
Vol 3201 (1) ◽  
pp. 45 ◽  
Author(s):  
KANISHKA D.B. UKUWELA ◽  
KATE L. SANDERS ◽  
BRYAN G. FRY
Keyword(s):  
New Species ◽  
Habitat Preferences ◽  
The Body ◽  
Colour Pattern ◽  
Northern Australia ◽  
Nucleotide Substitutions ◽  
Sea Snake ◽  
Sea Snakes ◽  
Morphological Diagnosis ◽  
By Catch

A new species of viviparous sea snake, Hydrophis donaldi sp. nov. (Hydrophiinae), is described from the Gulf of Carpen-taria, northern Australia. Molecular analyses reveal this species as a deeply divergent lineage within the Hydrophis sub-group, and separate it from all other sampled taxa by fixed nucleotide substitutions at three independent mitochondrial andnuclear loci. The new species is assigned to Hydrophis based on the current morphological diagnosis of this large but pa-raphyletic genus, and is distinguished from all other Hydrophis species and closely allied genera by a combination of mor-phological characters relating to scalation, colour pattern and osteology. Using current keys for sea snakes, H. donaldi sp.nov. might be mistaken for H. coggeri, H. sibauensis or H. torquatus diadema but it is readily distinguished from thesespecies by a higher number of bands on the body and tail, lower ventral count, strongly spinous body scales, and a wider,more rounded head. Sea snakes have been sampled intensively in the Gulf of Carpentaria due to their vulnerability to by-catch in the region’s commercial prawn-trawl fisheries. That this highly distinctive new species has evaded discovery inthe region until now is surprising, but might be explained by its habitat preferences. All known specimens of H. donaldi sp. nov. were found in estuarine habitats that are relatively poorly surveyed and are not targeted by commercial fisheries.

scholarly journals Occurrence and Variability of Crenicichla Saxatilis (Linnaeus, 1758) in Surinam, and Restriction of its Typelocality (Pisces, Perciformes, Cichlidae)

1986 ◽  
Vol 56 (1) ◽  
pp. 47-59
Author(s):  
A. Ploeg
Keyword(s):  
Colour Pattern ◽  
South American ◽  
The South ◽  
Morphometric Characters ◽  
Cichlid Species

The South American cichlid species Crenicichla saxatilis (Linnaeus, 1758) is redescribed and figured. The variability of colour pattern, and meristic and morphometric characters are recorded, based on examination of hundreds of specimens from Surinam, including the lectotype. The morphometric characters are tested on validity and discussed.

scholarly journals Sexual dimorphism of sharks from the amazonian equatorial coast

2015 ◽  
Vol 20 (3) ◽  
pp. 297 ◽  
Author(s):  
Jorge Luiz Silva Nunes ◽  
Ana Paula Barbosa Martins ◽  
Ednaldo Da Silva Filho ◽  
Leonardo Manir Feitosa ◽  
Luiz Phelipe Nunes e Silva ◽  
...  
Keyword(s):  
Sexual Dimorphism ◽  
Discriminant Analysis ◽  
Mating Behavior ◽  
T Test ◽  
Internal Fertilization ◽  
Morphometric Characters ◽  
Morphological Differences ◽  
Student’S T ◽  
Different Levels ◽  
Student’S T Test

Sexual dimorphism is a widespread feature in several groups of vertebrates. Chondrichthyans differ sexually due to the presence of the clasper, a structure for internal fertilization, and other sexual differences in secondary characteristics. Nevertheless, studies assessing these variations are fairly rare. The main goal of this study is to identify differences in sexual dimorphism in three species of sharks from the Carcharhinidae family (<em>Rhizoprionodon porosus</em>, <em>Carcharhinus porosus</em> and <em>Isogomphodon oxyrhynchus</em>) using morphometric tools. A total of 213 specimens were captured in the Amazonian Equatorial Coast and analyzed using 65 morphometric characters. Discriminant analysis and The Student's t-test were used to demonstrate the morphological differences among sexes. Sexual dimorphism was reported at different levels for the three species. This study suggests that the most likely explanation for the presence of these variations is related to their reproductive characteristics and mating behavior.

First record of the tribe Diglottini from South America with description of Diglotta brasiliensis n. sp. (Coleoptera, Staphylinidae, Aleocharinae)

Zootaxa ◽  
2008 ◽  
Vol 1776 (1) ◽  
pp. 52 ◽  
Author(s):  
EDILSON CARON ◽  
CIBELE STRAMARE RIBEIRO-COSTA
Keyword(s):  
New Species ◽  
New Zealand ◽  
Sexual Dimorphism ◽  
South America ◽  
First Record ◽  
Southern Brazil ◽  
Rove Beetle ◽  
Fiji Islands ◽  
First Time ◽  
A New Species

The tribe Diglottini Eichelbaum, 1909 comprises two halophilous rove beetle genera Diglotta Champion, 1899, and Paradiglotta Ashe & Ahn, 2004. The tribe contains eight known species distributed in the Nearctic and West-Palaearctic regions, and also Fiji Islands and New Zealand. This tribe is recorded for the first time from South America with the description of a new species, Diglotta brasiliensis n. sp. from southern Brazil (Paraná). Characters of the mouthparts, aedeagus and spermatheca of the new species are illustrated and compared with other Diglotta species. Sexual dimorphism is reported for the first time in the genus.

Growth, sexual dimorphism, and population biology of the olive sea snake, Aipysurus laevis, on the Great Barrier Reef of Australia

2000 ◽  
Vol 21 (3) ◽  
pp. 289-300 ◽  
Author(s):  
Glen Burns ◽  
Harold Heatwole
Keyword(s):  
Sexual Dimorphism ◽  
Great Barrier Reef ◽  
Population Biology ◽  
Sexual Maturity ◽  
Reproductive Behaviour ◽  
Barrier Reef ◽  
Sea Snake ◽  
Sea Snakes ◽  
Equivalent Length ◽  
Reef Edge

AbstractThe olive sea snake, Aipysurus laevis (Lacépède) grows at a rate of 0.22-0.95 cm/month, with young animals growing faster than older ones. Males reach sexual maturity in their third year and females in their fourth or fifth year. There is sexual dimorphism in size, with females larger than males; at snout-vent lengths greater than 80 cm, females are heavier than males of equivalent length. Small snakes were uncommon. Apparent sexratio favours males in winter but moves toward equality or even a preponderance of females in summer, probably reflecting changes in reproductive behaviour. Numbers of snakes are approximately 0.70-0.86 snakes per metre of reef edge. Olive sea snakes live to about 15 years or older.

Neuromuscular effects of a toxic phospholipase A2 and its nontoxic homologue from the venom of the sea snake, Laticauda colubrina

Toxicon ◽  
1989 ◽  
Vol 27 (5) ◽  
pp. 587-591 ◽  
Author(s):  
Edward G. Rowan ◽  
Alan L. Harvey ◽  
Chikahisa Takasaki ◽  
Nobuo Tamiya
Keyword(s):  
Phospholipase A2 ◽  
Sea Snake ◽  
Laticauda Colubrina
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