scholarly journals From land and sea, long‐term data reveal persistent humpback whale (Megaptera novaeangliae) breeding habitat in New Caledonia

2019 ◽  
Vol 29 (10) ◽  
pp. 1697-1711 ◽  
Author(s):  
Solène Derville ◽  
Leigh G. Torres ◽  
Rémi Dodémont ◽  
Véronique Perard ◽  
Claire Garrigue
Keyword(s):  
New Caledonia ◽  
Humpback Whale ◽  
Megaptera Novaeangliae ◽  
Breeding Habitat ◽  
Term Data

Geograpmc Variation in South Pacific Humpback Whale Songs

Behaviour ◽  
1998 ◽  
Vol 135 (1) ◽  
pp. 1-27 ◽  
Author(s):  
David Helweg ◽  
Peter Jenkins ◽  
Douglas Cat ◽  
Robert McCauley ◽  
Claire Garrigue
Keyword(s):  
New Zealand ◽  
Cultural Transmission ◽  
Regional Differences ◽  
New Caledonia ◽  
South Pacific ◽  
Humpback Whale ◽  
Megaptera Novaeangliae ◽  
Humpback Whales ◽  
Song Sharing ◽  
Eastern Australia

AbstractEvery winter, (male) humpback whales (Megaptera novaeangliae) produce long complex songs. Song content is dynamic and singers incorporate changes as they occur, thus song is shared through cultural transmission. We compared songs recorded in winter migratory termini in Tonga, New Caledonia, Eastern Australia, and on migration paths off Eastern Australia and New Zealand, in the winter of 1994. Seven themes were shared by all regions, with an additional two themes shared by all but Tonga. Differences in regional variants were most pronounced between Tongan and Eastern Australian song. New Caledonian and Kaikouran song were more similar to songs from Eastern Australia rather than Tonga. These regional differences were stable across the season. The results suggest some migratory exchange among widely separate wintering regions of Area V, consistent with tag recovery data, but the time and location at which song sharing occurs remains speculative.

Hydrogeological responses in tropical mountainous springs

2019 ◽  
Author(s):  
Ricardo Sánchez-Murillo
Keyword(s):  
Costa Rica ◽  
Isotope Composition ◽  
Central Valley ◽  
Distribution Functions ◽  
Geochemical Composition ◽  
Transit Times ◽  
Management Plans ◽  
Best Fit ◽  
Term Data

This study presents a hydrogeochemical analysis of spring responses (2013-2017) in the tropical mountainous region of the Central Valley of Costa Rica. The isotopic distribution of δ18O and δ2H in rainfall resulted in a highly significant meteoric water line: δ2H = 7.93×δ18O + 10.37 (r2=0.97). Rainfall isotope composition exhibited a strong dependent seasonality. The isotopic variation (δ18O) of two springs within the Barva aquifer was simulated using the FlowPC program to determine mean transit times (MTTs). Exponential-piston and dispersion distribution functions provided the best-fit to the observed isotopic composition at Flores and Sacramento springs, respectively. MTTs corresponded to 1.23±0.03 (Sacramento) and 1.42±0.04 (Flores) years. The greater MTT was represented by a homogeneous geochemical composition at Flores, whereas the smaller MTT at Sacramento is reflected in a more variable geochemical response. The results may be used to enhance modelling efforts in central Costa Rica, whereby scarcity of long-term data limits water resources management plans.

Characterizing Patterns within Humpback Whale (Megaptera novaeangliae) Songs

2007 ◽  
Vol 33 (2) ◽  
pp. 202-213 ◽  
Author(s):  
Sean R. Green ◽  
Eduardo Mercado ◽  
Adam A. Pack ◽  
Louis M. Herman
Keyword(s):  
Humpback Whale ◽  
Megaptera Novaeangliae

Experimental evidences for chaotic dynamics in the vocalizations of the humpback whale megaptera novaeangliae

2006 ◽  
Vol 1 (2) ◽  
pp. 180-188
Author(s):  
A. Facchini ◽  
F. Delogu ◽  
L. Lambroni ◽  
F.M. Pulselli ◽  
E.B.P. Tiezzi
Keyword(s):  
Chaotic Dynamics ◽  
Humpback Whale ◽  
Megaptera Novaeangliae

Morphometric studies of artemia males from different populations of the Altai region

2020 ◽  
pp. 28-38
Author(s):  
L. Vesnina ◽  
G. Lukerina ◽  
T. Ronzhina ◽  
A. Savos’kin ◽  
D. Surkov
Keyword(s):  
Sexual Dimorphism ◽  
Hydrogen Index ◽  
Morphometric Parameters ◽  
Altai Region ◽  
Sexual Structure ◽  
Different Populations ◽  
Artemia Population ◽  
Term Data ◽  
Brine Salinity

The long-term data from morphometric studies of Artemia males from bisexual and parthenogenetic populations from hyperhaline reservoirs of the Altai region (Bolshoe Yarovoe Lake, Maloe Shklo Lake, and the Tanatar Lakes system) is analyzed in this paper. The description of signs of sexual dimorphism and sexual structure in different populations is given. The influence of brine salinity and hydrogen index on morphometric parameters of males was analyzed. There are differences in the sexual structure of the Artemia population: in the lakes Maloe Shklo and the thanatar system, the populations are bisexual (the share of males is 28.5 — 75.0 %), in the lake Bolshoe yarovoe — parthenogenetic (the share of males on average does not exceed 3 %). At the same time, sexual dimorphism is typical for both types of populations: females are larger than males, males have a larger head (the distance between the eyes is greater by 15.5 %, the diameter of the eye is 26.1 %, the length of the antenna is 22.3 %) and a larger number of bristles (36.1 %). The greatest variability is observed in the parameters of the Furka structure associated with the salinity of water by feedback and the pH — line indicator. Significant differences between the samples of males were revealed. The largest number of significant differences in morphometric indicators was found between samples of males from bisexual populations (lake thanatar and lake Maloe Shklo), the smallest — between males from the parthenogenetic population of lake Bolshoe yarovoe and males from lake Maloe Shklo.

Sign in / Sign up

Export Citation Format

Share Document