@article{fdi:010067992,
  title = {{T}he remarkable population size of the endangered clam {T}ridacna maxima assessed in {F}angatau {A}toll ({E}astern {T}uamotu, {F}rench {P}olynesia) using in situ and remote sensing data},
  author = {{A}ndr{\'e}fou{\¨e}t, {S}erge and {G}ilbert, {A}. and {Y}an, {L}. and {R}emoissenet, {G}. and {P}ayri, {C}laude and {C}hancerelle, {Y}.},
  editor = {},
  language = {{ENG}},
  abstract = {{S}everal lagoons of the {E}astern {T}uamotu {A}tolls ({F}rench {P}olynesia) are characterized by enormous populations of the clam {T}ridacna maxima, a species considered as endangered in many locations worldwide. {T}his unique resource is virtually intact, until recently being impacted only by local consumption. {I}ncreasing exports to {T}ahiti's market (up to 50 tonnes of wet matter y(-1)), combined with the relatively small size of these lagoons (< 50 km(2)), have raised significant concerns for agencies charged with management of lagoonal resources. {I}n order to evaluate whether the current harvesting pressure threatens long-term sustainability of this resource, it is necessary to estimate the total number of individual clams present and also the fraction of that stock that is currently targeted by fishers, who generally collect clams in very shallow waters (< 1 m), walking on the reef edges. {H}ere, we present results for a pilot study evaluating this resource at {F}angatau {A}toll. {U}sing a combination of data collected in situ and three remotely sensed images with different spatial resolution (1.5, 5.6, and 30 m), we estimate that the shallowest lagoonal areas (4.05 km(2) at depth < 6 m) harbour five classes of benthic habitat with significantly different clam areal covers and densities. {C}onsidering the cover/density values for each habitat class, 23.65 +/- 5.33 million clams (mean +/- 95% confidence interval) inhabit these 4.05 km(2). {A}ssuming that current harvesting techniques will be maintained in the future, the commercially available stock represents 44% of the population located on 1.18 km(2) of the shallow lagoon. {A} comparison of results from the three remote sensing platforms indicates that high resolution, broadband multispectral sensors (e.g. {IKONOS}, {Q}uickbird) should provide the best existing platforms to conduct similar assessments elsewhere.},
  keywords = {{TUAMOTU} {GAMBIER}},
  booktitle = {},
  journal = {{ICES} {J}ournal of {M}arine {S}cience},
  volume = {62},
  numero = {6},
  pages = {1037--1048},
  ISSN = {1054-3139},
  year = {2005},
  DOI = {10.1016/j.icesjms.2005.04.006},
  URL = {https://www.documentation.ird.fr/hor/fdi:010067992},
}