scholarly journals Distribution of mtDNA haplotypes in North Atlantic humpback whales: the influence of behaviour on population structure

1995 ◽  
Vol 116 ◽  
pp. 1-10 ◽  
Author(s):  
PJ Palsbøll ◽  
PJ Clapham ◽  
DK Mattila ◽  
F Larsen ◽  
R Sears ◽  
...  
Keyword(s):  
Population Structure ◽  
North Atlantic ◽  
Humpback Whales ◽  
Mtdna Haplotypes

A longitudinal study of humpback whales in Irish waters

2015 ◽  
Vol 96 (4) ◽  
pp. 877-883 ◽  
Author(s):  
Conor Ryan ◽  
Pádraig Whooley ◽  
Simon D. Berrow ◽  
Colin Barnes ◽  
Nick Massett ◽  
...  
Keyword(s):  
Longitudinal Study ◽  
North Atlantic ◽  
Spatial Scales ◽  
Humpback Whales ◽  
Migratory Species ◽  
The Public ◽  
Photo Identification ◽  
The North ◽  
Breeding Grounds ◽  
Eastern North Atlantic

Knowledge on the ecology of humpback whales in the eastern North Atlantic is lacking by comparison with most other ocean basins. Humpback whales were historically over-exploited in the region and are still found in low relative abundances. This, coupled with their large range makes them difficult to study. With the aim of informing more effective conservation measures in Ireland, the Irish Whale and Dolphin Group began recording sightings and images suitable for photo-identification of humpback whales from Irish waters in 1999. Validated records submitted by members of the public and data from dedicated surveys were analysed to form a longitudinal study of individually recognizable humpback whales. The distribution, relative abundance and seasonality of humpback whale sighting records are presented, revealing discrete important areas for humpback whales in Irish coastal waters. An annual easterly movement of humpback whales along the southern coast of Ireland is documented, mirroring that of their preferred prey: herring and sprat. Photo-identification images were compared with others collected throughout the North Atlantic (N = 8016), resulting in matches of two individuals between Ireland and Iceland, Norway and the Netherlands but no matches to known breeding grounds (Cape Verde and West Indies). This study demonstrates that combining public records with dedicated survey data is an effective approach to studying low-density, threatened migratory species over temporal and spatial scales that are relevant to conservation and management.

scholarly journals More of the same: allopatric humpback whale populations share acoustic repertoire

PeerJ ◽  
2018 ◽  
Vol 6 ◽  
pp. e5365 ◽  
Author(s):  
Michelle E.H. Fournet ◽  
Lauren Jacobsen ◽  
Christine M. Gabriele ◽  
David K. Mellinger ◽  
Holger Klinck
Keyword(s):  
North Atlantic ◽  
North Atlantic Ocean ◽  
North Pacific Ocean ◽  
Humpback Whale ◽  
Humpback Whales ◽  
Massachusetts Bay ◽  
Baleen Whale ◽  
Southeast Alaska ◽  
Allopatric Populations ◽  
Strong Contrast

Background Humpback whales (Megaptera novaeangliae) are a widespread, vocal baleen whale best known for producing song, a complex, repetitive, geographically distinct acoustic signal sung by males, predominantly in a breeding context. Humpback whales worldwide also produce non-song vocalizations (“calls”) throughout their migratory range, some of which are stable across generations. Methods We looked for evidence that temporally stable call types are shared by two allopatric humpback whale populations while on their northern hemisphere foraging grounds in order to test the hypothesis that some calls, in strong contrast to song, are innate within the humpback whale acoustic repertoire. Results Despite being geographically and genetically distinct populations, humpback whales in Southeast Alaska (North Pacific Ocean) share at least five call types with conspecifics in Massachusetts Bay (North Atlantic Ocean). Discussion This study is the first to identify call types shared by allopatric populations, and provides evidence that some call types may be innate.

scholarly journals Distribution and population structure of endobacteria in arbuscular mycorrhizal fungi at North Atlantic dunes

2018 ◽  
Vol 12 (12) ◽  
pp. 3001-3013 ◽  
Author(s):  
Olga A. Lastovetsky ◽  
Ezekiel Ahn ◽  
Stephen J. Mondo ◽  
Kevin H. Toomer ◽  
Aolin Zhang ◽  
...  
Keyword(s):  
Population Structure ◽  
Arbuscular Mycorrhizal Fungi ◽  
North Atlantic ◽  
Mycorrhizal Fungi ◽  
Arbuscular Mycorrhizal

scholarly journals Population structure and spatial distribution of porbeagles (Lamna nasus) in Irish waters

2019 ◽  
Vol 76 (6) ◽  
pp. 1581-1590 ◽  
Author(s):  
Luke W J Cameron ◽  
William K Roche ◽  
Jonathan D R Houghton ◽  
Paul J Mensink
Keyword(s):  
Population Structure ◽  
Spatial Distribution ◽  
North Atlantic ◽  
Population Decline ◽  
The North ◽  
Aggregation Site ◽  
Show Evidence ◽  
Long Term Trends ◽  
Almost All

Abstract Porbeagles throughout the North Atlantic have experienced severe population decline through overfishing, with the northeastern population listed as critically endangered. Management of this population is constrained by the paucity of data on porbeagle population structure, distribution and behaviour in this region. Here we use a long-term (47 year) Irish capture-mark-recapture dataset to investigate the population structure, spatial distribution and seasonal movements of this species. From 1970–2017, a total of 268 sharks (9 recaptures) were ID tagged, with most individuals likely being juvenile based on length at maturity estimates (mean total length = 143.9 cm, SD = 35.4). Almost all captures were recorded at three distinct locations near angling hubs along the south, west and north coasts with catches peaking in August. Long-term trends in capture date indicated a shift towards earlier capture dates in the northern site (n = 153). Our findings suggest Irish waters may act as a persistent summer aggregation site for juveniles, which show evidence for seasonal site fidelity, returning to nearby locations between years. These findings demonstrate the utility of such programmes, which can be implemented, with minimal expense by engaging with the angling sector, to elucidate the population structure and distribution of wide-ranging fish species.

scholarly journals A review of the biology and genetics of sea lice

2006 ◽  
Vol 63 (7) ◽  
pp. 1304-1316 ◽  
Author(s):  
Karin Boxaspen
Keyword(s):  
Population Structure ◽  
North Atlantic ◽  
Developmental Stages ◽  
Management Strategies ◽  
Molecular Techniques ◽  
Sea Lice ◽  
Lepeophtheirus Salmonis ◽  
New Research ◽  
And Control

Abstract Studies of the biology of sea lice have been conducted from various perspectives for two decades. For Lepeophtheirus spp., most of the published literature has centred on the economically important Lepeophtheirus salmonis, while for Caligus spp., research has focused on a wider range of species. The most numerous species of Caligus in North Atlantic waters, however, is Caligus elongatus, which is also economically important to salmon farming. Since the last review by Pike, A. W., and Wadsworth, S. L. (1999. Sea lice on salmonids: their biology and control. Advances in Parasitology, 44: 234–337.), research on sea lice has developed considerably, including the application of genetic methods. This new research has focused on life history biology, studying developmental stages under different environmental conditions (e.g. temperature and salinity), behaviour, distribution and the dispersal of free-living stages, monitoring practices, population structure, and modelling. The results of this research have informed risk analyses and allowed the refinement of management strategies to reduce sea lice infestations in wild and farmed populations of anadromous salmonids. Molecular techniques have been used to describe population structure and identify differences in genetic characterization of geographically separate populations and population markers. Research has been initiated to understand the parasite–host relationship at a molecular level and to develop a vaccine against sea lice.

scholarly journals Population structure of humpback whales in the western and central South Pacific Ocean as determined by vocal exchange among populations

2015 ◽  
Vol 29 (4) ◽  
pp. 1198-1207 ◽  
Author(s):  
Ellen C. Garland ◽  
Anne W. Goldizen ◽  
Matthew S. Lilley ◽  
Melinda L. Rekdahl ◽  
Claire Garrigue ◽  
...  
Keyword(s):  
Population Structure ◽  
Pacific Ocean ◽  
South Pacific ◽  
Humpback Whales ◽  
South Pacific Ocean ◽  
Vocal Exchange ◽  
Central South

Trichodesmium spp. population structure in the eastern North Atlantic subtropical gyre

2010 ◽  
Vol 57 (1) ◽  
pp. 65-77 ◽  
Author(s):  
Fernando González Taboada ◽  
Ricardo González Gil ◽  
Juan Höfer ◽  
Sonia González ◽  
Ricardo Anadón
Keyword(s):  
Population Structure ◽  
North Atlantic ◽  
Subtropical Gyre ◽  
Eastern North Atlantic

scholarly journals Genetic isolation of a now extinct population of bottlenose dolphins ( Tursiops truncatus )

2007 ◽  
Vol 274 (1618) ◽  
pp. 1611-1616 ◽  
Author(s):  
Courtney Nichols ◽  
Jerry Herman ◽  
Oscar E Gaggiotti ◽  
Keith M Dobney ◽  
Kim Parsons ◽  
...  
Keyword(s):  
Population Structure ◽  
North Atlantic ◽  
Tursiops Truncatus ◽  
Bottlenose Dolphins ◽  
Range Shift ◽  
Sympatric Populations ◽  
Regional Population ◽  
The Uk ◽  
Historical Range ◽  
Local Habitat

A number of dolphin species, though highly mobile, show genetic structure among parapatric and sometimes sympatric populations. However, little is known about the temporal patterns of population structure for these species. Here, we apply Bayesian inference and data from ancient DNA to assess the structure and dynamics of bottlenose dolphin ( Tursiops truncatus ) populations in the coastal waters of the UK. We show that regional population structure in UK waters is consistent with earlier studies suggesting local habitat dependence for this species in the Mediterranean Sea and North Atlantic. One genetically differentiated UK population went extinct at least 100 years ago and has not been replaced. The data indicate that this was a local extinction, and not a case of historical range shift or contraction. One possible interpretation is a declining metapopulation and conservation need for this species in the UK.

scholarly journals Abundant mitochondrial DNA variation and world-wide population structure in humpback whales.

1993 ◽  
Vol 90 (17) ◽  
pp. 8239-8243 ◽  
Author(s):  
C. S. Baker ◽  
A. Perry ◽  
J. L. Bannister ◽  
M. T. Weinrich ◽  
R. B. Abernethy ◽  
...  
Keyword(s):  
Mitochondrial Dna ◽  
Population Structure ◽  
World Wide ◽  
Humpback Whales ◽  
Dna Variation ◽  
Wide Population
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