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John A. B. Claydon
The School for Field Studies
EcologyFisheryReefCoral reefBiology
12Publications
7H-index
282Citations
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Publications 13
Newest
#1Marta C. CalossoH-Index: 6
#2John A. B. ClaydonH-Index: 7
Last. Donna-Mareè Cawthorn (University of Salford)H-Index: 3
view all 4 authors...
Abstract Seafood mislabelling is a global issue that affects consumers, target species, and the ability to manage fisheries. Due to their high demand and value, groupers (Epinephelinae spp.) are frequent targets for fraudulent substitution on the world's major seafood markets. Yet, little is known on the prevalence of grouper mislabelling in the Wider Caribbean Region. We conducted the first ‘grouper’ authentication survey in the Turks and Caicos Islands (TCI), a luxury tourist destination where...
Source
#1Karen A. Bjorndal (UF: University of Florida)H-Index: 56
#2Alan B. Bolten (UF: University of Florida)H-Index: 45
Last. Lory KenyonH-Index: 1
view all 72 authors...
Somatic growth is an integrated, individual-based response to environmental conditions, especially in ectotherms. Growth dynamics of large, mobile animals are particularly useful as bio-indicators of environmental change at regional scales. We assembled growth rate data from throughout the West Atlantic for green turtles, Chelonia mydas, which are long-lived, highly migratory, primarily herbivorous mega-consumers that may migrate over hundreds to thousands of kilometers. Our dataset, the largest...
7 CitationsSource
#1Karen A. Bjorndal (UF: University of Florida)H-Index: 56
#2Milani Chaloupka (UQ: University of Queensland)H-Index: 30
Last. Alan B. Bolten (UF: University of Florida)H-Index: 45
view all 46 authors...
Somatic growth dynamics are an integrated response to environmental conditions. Hawksbill sea turtles (Eretmochelys imbricata) are long-lived, major consumers in coral reef habitats that move over broad geographic areas (hundreds to thousands of kilometers). We evaluated spatio-temporal effects on hawksbill growth dynamics over a 33-yr period and 24 study sites throughout the West Atlantic and explored relationships between growth dynamics and climate indices. We compiled the largest ever data s...
54 CitationsSource
In
order
to
determine
the
depth
at
which
to
perform
extensive
GPS‐tracked
surveys,
10
min
timed surveys
were
conducted
on
SCUBA
at
depths
of
1,
3,
5,
10,
15
and
20
m
in
non‐mangrove
habitats. Timed surveys were performed at 20 haphazardly selected sites around the sheltered coast of Bonaire
and
Klein
Bonaire (Figure
S1),
during
which
all
S.
guacamaia
were
recorded.
Surveys
were conducted
between
0900
and
1600
hrs
to
avoid
times
of
day
when
the
parrotfish
would
be
moving to or from night shelter ...
1 CitationsSource
#1Alexis M. Jackson (UCSC: University of California, Santa Cruz)H-Index: 6
#2Brice X. Semmens (UCSD: University of California, San Diego)H-Index: 26
Last. Giacomo Bernardi (UCSC: University of California, Santa Cruz)H-Index: 39
view all 12 authors...
To address patterns of genetic connectivity in a mass-aggregating marine fish, we analyzed genetic variation in mitochondrial DNA (mtDNA), microsatellites, and single nucleotide polymorphisms (SNPs) for Nassau grouper (Epinephelus striatus). We expected Nassau grouper to exhibit genetic differentiation among its subpopulations due to its reproductive behavior and retentive oceanographic conditions experienced across the Caribbean basin. All samples were genotyped for two mitochondrial markers an...
22 CitationsSource
#1John A. B. Claydon (The School for Field Studies)H-Index: 7
#2Mark I. McCormick (JCU: James Cook University)H-Index: 58
Last. Geoffrey P. Jones (JCU: James Cook University)H-Index: 61
view all 3 authors...
Spawning sites used by one or more species were located by intensively searching nearshore coral reefs of Kimbe Bay (New Britain, Papua New Guinea). Once identified, the spawning sites were surveyed repeatedly within fixed 5 m radius circular areas, for > 2000 h of observations ranging from before dawn to after dusk spanning 190 days between July 2001 and May 2004. A total of 38 spawning sites were identified on the seven study reefs distributed at an average of one site every 60 m of reef edge....
17 CitationsSource
#1Thomas B. Stringell (University of Exeter)H-Index: 6
#2Marta C. Calosso (The School for Field Studies)H-Index: 6
Last. Annette C. Broderick (University of Exeter)H-Index: 52
view all 11 authors...
Abstract Small-scale fisheries (SSF) account for around half of the world's marine and inland fisheries, but their impact on the marine environment is usually under-estimated owing to difficulties in monitoring and regulation. Successful management of mixed SSF requires holistic approaches that sustainably exploit target species, consider non-target species and maintain fisher livelihoods. For two years, we studied the marine turtle fishery in the Turks and Caicos Islands (TCI) in the Wider Cari...
9 CitationsSource
#1John A. B. Claydon (The School for Field Studies)H-Index: 7
#2Mark I. McCormick (JCU: James Cook University)H-Index: 58
Last. Geoffrey P. Jones (JCU: James Cook University)H-Index: 61
view all 3 authors...
Many coral reef fishes exhibit regular localised migrations between feeding and spawning areas, but the factors affecting these migration patterns, such as the distance, frequency and spawning site fidelity are poorly understood. The aim of this study was to investigate the patterns of migration to spawning sites of the surgeonfish, Ctenochaetus striatus (Acanthuridae). We explored relationships amongst an individual’s size and sex, the distance and frequency it migrated from its feeding area to...
19 CitationsSource
The invasion of the Indo-Pacific lionfish Pterois volitans into the western Atlantic, Caribbean Sea, and Gulf of Mexico is the fastest ever documented for a marine fish. Few studies have addressed the establishment of lionfish populations within a location, and habitats other than reefs have been largely overlooked. The present study reconstructed the invasion around South Caicos, Turks and Caicos Islands (TCI), from multiple sources of data. Densities and size frequen- cies of lionfish were com...
55 CitationsSource
#1Richardson PbH-Index: 1
#2Calosso McH-Index: 1
Last. Broderick AcH-Index: 1
view all 10 authors...
1 Citations
12