scholarly journals Larval development and allometric growth of the black-faced blenny Tripterygion delaisi

2017 ◽  
Vol 90 (6) ◽  
pp. 2239-2254
Author(s):  
F. N. Solomon ◽  
D. Rodrigues ◽  
E. J. Gonçalves ◽  
E. A. Serrão ◽  
R. Borges
Keyword(s):  
Larval Development ◽  
Allometric Growth ◽  
Tripterygion Delaisi

Larval development of the saucer scallop Amusium balloti (Bernardi) (Mollusca : Pectinidae)

1988 ◽  
Vol 39 (2) ◽  
pp. 153 ◽  
Author(s):  
RA Rose ◽  
GR Campbell ◽  
SG Sanders
Keyword(s):  
Larval Development ◽  
Growth Curve ◽  
Shell Length ◽  
Growth Equation ◽  
Allometric Growth ◽  
Hinge Line ◽  
Statistical Comparison ◽  
The Right ◽  
Relationship Of ◽  
General Appearance

Larvae of A. balloti from Queensland and Western Australia were reared from ova with diameters ranging from 57 to 86�m. The straight-hinged veligers grew in shell length from 85 to 163 �m. Moderately protruding umbones developed 8 days after fertilization. The length (L) and height (H) relationship of larval shells was described by the allometric growth curve: H = 0.600L1.064. The provinculum of 15-day-old larval shells was undifferentiated and each valve had taxodontal teeth, at each end of the hinge line. Eye spots were present and common in pediveligers of 162-242 �m in length. Metamorphosis began 20 days after fertilization at 18-19� C when larvae were 178�m or longer. Settlement began on the 22nd day and lasted 5 days. Newly settled spat developed a byssal notch on the right valve, but attachment by byssal threads was never permanent. The length (L) and height (H) relationships of spat shells was described by the allometric growth equation H = 1.782L0.857. General appearance of A. balloti larvae was comparable to that of other pectinids. Statistical comparison of height-length relationships of the larval shells of A. balloti and Chlamys asperrimus showed larvae of A. balloti to be the more oblong at lengths greater than 128�m. The most significant characteristic of A. balloti spat shells was the formation of rounded auricles at the end of the hinge-line of each valve.

Effects of ocean acidification on larval development and early post-hatching traits in Concholepas concholepas (loco)

2014 ◽  
Vol 514 ◽  
pp. 87-103 ◽  
Author(s):  
PH Manríquez ◽  
ME Jara ◽  
ML Mardones ◽  
R Torres ◽  
NA Lagos ◽  
...  
Keyword(s):  
Ocean Acidification ◽  
Larval Development ◽  
Concholepas Concholepas

Mandibular Protractions and Their Correlation with Meal Size in Juvenile Thai Snakes During Ingestion of Rodent Prey

2011 ◽  
Vol 4 (1) ◽  
pp. 31-33
Author(s):  
Merel J. Cox ◽  
David Chiszar ◽  
Hobart M. Smith
Keyword(s):  
Body Weight ◽  
Body Length ◽  
Meal Size ◽  
Allometric Growth ◽  
Rodent Prey

Nine neonatal and juvenile snakes, four vipers and five nonvipers, were fed rodent meals varying in size, expressed as percent of snake body weight. The number of mandibular protractions and the time to complete swallowing were recorded, with both measures increasing linearly as a function of meal size. These young snakes routinely swallowed meals that were 50% of body weight, and ranged up to 80%, far higher than meals reported by previous workers studying adult vipers (36.4%) and nonvipers (18.4%). Furthermore, the slopes of regressions relating mandibular protractions to meal size in all of our snakes were lower than comparable slopes for adult vipers or nonvipers. We hypothesized that the relatively long and wide skulls of young snakes (i.e., as proportion of body length) were responsible for these ingestive accomplishments, with negative allometric growth being responsible for performance changes during ontogeny.

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