true

ISRA FACTSHEETS

NEW ZEALAND & PACIFIC ISLANDS REGION

ISRA FACTSHEETS

NEW ZEALAND & PACIFIC ISLANDS REGION

Ténia ISRA

140/179

Ténia ISRA

Ténia

Summary

Ténia is located in the barrier reef on the southwestern coast of Grande Terre Island in New Caledonia. It comprises an exposed reef corner and a wide pass in the barrier reef. The habitat is characterised by steep reef walls and the area is influenced by currents. Within this area there are: threatened species and undefined aggregations (Grey Reef Shark Carcharhinus amblyrhynchos).

Ténia

Ténia

DESCRIPTION OF HABITAT

Ténia is located on the southwestern coast of Grande Terre Island in New Caledonia. The area includes a reef corner that is part of the barrier reef and a wide pass in the barrier reef south of Ténia Island. The habitat is characterised by steep coral reef walls and pelagic waters. Ténia is exposed to meso-tides, oceanic swells, and trade winds (Sous et al. 2017). The area is influenced by currents, both on the exposed reef corner and in the pass.

The area overlaps with the Grand Lagon Sud Marin Key Biodiversity Area (KBA 2024).

This Important Shark and Ray Area is benthic and pelagic and is delineated from inshore and surface waters (0 m) to 280 m based on the global depth range of the Qualifying Species.

CRITERION A

VULNERABILITY

One Qualifying Species considered threatened with extinction according to the IUCN Red List of Threatened Species regularly occurs in the area. This is the Endangered Grey Reef Shark (Simpfendorfer et al. 2020).

CRITERION C

SUB-CRITERION C5 – UNDEFINED AGGREGATIONS

Ténia is an important area for undefined aggregations of one shark species.

Aggregations of Grey Reef Sharks are regularly recorded by recreational divers in this area. Social media posts show that aggregations comprise on average at least ~10–20 individuals with observations reported between 2020–2024. Reports were made from various months (March, n = 4 reports; April, n = 1; May, n = 1; September, n = 1; October, n = 2; November = 1), highlighting the regular occurrence of aggregations, although further information is required to determine if there is a seasonality in their abundance. This area may be important for reproductive purposes, as some individuals are observed with mating scars and there are videos of what appear to be small individuals in an aggregation. Although there is no information on dive effort in the area to examine the frequency of Grey Reef Shark aggregations, it is likely to be high as this site includes one of the few barrier reef channels in the southwestern Grand Terre region. Two other channels ~50 km (Passe de Dumbéa) and ~75 km (Passe de Boulari) southeast of the area also host Grey Reef Shark aggregations, and such channels are generally suitable for the aggregations of this species (Papastamatiou et al. 2021).  Further information is required to determine the nature and function of these aggregations.

Ténia

SUBMIT A REQUEST

ISRA SPATIAL LAYER REQUEST

To make a request to download the ISRA Layer in either a GIS compatible Shapefile (.shp) or Google Earth compatible Keyhole Markup Language Zipped file (.kmz) please complete the following form. We will review your request and send the download details to you. We will endeavor to send you the requested files as soon as we can. However, please note that this is not an automated process, and before requests are responded to, they undergo internal review and authorization. As such, requests normally take 5–10 working days to process.

Should you have questions about the data or process, please do not hesitate to contact us.

    * indicates required

    Industry or sector (*)

    Under the terms and conditions of our User License Agreement , full and appropriate acknowledgement is required in any materials and publications derived from the data (and copies should be sent to the IUCN SSC Shark Specialist Group through the contact form). For any publications making substantial use of the data, the ISRA welcomes the opportunity for co-authorship, collaboration, and to comment prior to publication.


    Furthermore, we need to know whether you are a commercial or non-commercial user. Non-commercial includes scientific research, education or conservation. Commercial is defined as follows: any use by, on behalf of, or to inform or assist the activities of a commercial entity (that operates ‘for profit’) or use by a non-profit for the purposes of revenue generation

    Type of use(*):

    Please specify which layer (ex. all layers, layers within a specific Region, layers within a Jurisdiction or a single ISRA): Purpose (*):

    Please provide a description of how you intend to use the ISRA GIS Dataset. The more details you provide, the faster we can respond to your request. We may require further clarification prior to providing access. (min. 100 characters – max 1,000 characters)



    File format request (*)

    By providing your personal data, you consent to its processing as described below. The IUCN SSC Shark Specialist Group will use the information you provide on this form to send the documents you requested. You can change your mind at any time by writing to the ISRA Data Coordinator www.sharkrayareas.org/contact. All personal details provided will be treated with respect. For any information you can visit our Privacy Policy.
    Please read the User License Agreement and ISRA Layer Metadata Description

    This form uses Google reCaptcha to reduce spam. Privacy - Terms