Fish Populations in a Tidal Estuary in the Marlborough Sounds, New Zealand from 1971 to 2004 -

Language:

Home: ISSUES: Sustainable Development: Rio+20

an expanded view of Topics and Knowledge in the Atlas

Login for Members

Username

Password

	Forgotten your Password?
	Not a Member? Join Now
	Getting started

Navigate the Atlas:

1 RELATED TOPICS:

Topic Overview

Editors

KO Overview

Owner

Rio+20

Maintained by FAO-FI

Text-only Printer-friendly version

What is Rio+20 ?

Rio+20 Conference brought together world leaders, along with thousands of participants from governments, the private sector, NGOs and other groups to shape how we can reduce poverty, advance social equity and ensure environmental protection. It was hosted by the Government of Brazil and run from 20-22 June 2012 complemented by a range of events before, during and after.

The Conference focused on two themes: (a) a green economy in the context of sustainable development poverty eradication; and (b) the institutional framework for sustainable development. See More...

Photo title: Official logo of the Rio+20 Conference

Oceans at Rio+20

Issues related to oceans and oceans sustainability figured high on the Rio+20 agenda - it was chosen as one of the seven main issues to be discussed in depth. In the Rio+20 Conference Outcome Document The Future We Want, there is a dedicated section on oceans and seas, and small island developing States (SIDS), which stressed the critical role the oceans play in all three pillars of sustainable development, and commit[ed] to protect, and restore, the health, productivity and resilience of oceans and marine ecosystems, and to maintain their biodiversity, enabling their conservation and sustainable use for present and future generations.

For ocean related events, hosted by UNESCO-IOC, see Events below.

The world's oceans - their temperature, chemistry, currents and life - drive global systems that make the Earth habitable for humankind. Our rainwater, drinking water, weather, climate, coastlines, much of our food, and even the oxygen in the air we breathe, are all ultimately provided and regulated by the sea. Throughout history, oceans and seas have been vital conduits for trade and transportation. Careful management of this essential global resource is a key feature of a sustainable future. See More...

All (60)

Title

Fish Populations in a Tidal Estuary in the Marlborough Sounds, New Zealand from 1971 to 2004 ( DOCUMENT )

Author(s) / Editor(s)

Bray,J.R.;

Struik,G.

Description

Fish netted in a tidal New Zealand estuary from 1971 to 2004 declined between 1971-74 and 2001-04 by 46% in percent occupied tides, 70% in number per tide, 71% in weight per fish, 91% in weight per tide, 48% in length per fish and 85% in length per tide. There was a shift from Early to Mid Dominant species followed by fluctuation between Later Dominants and, briefly, Invaders. Degree of interspecific association was significantly dependent on food preference, a seasonal variable and level of intraspecific association. Spring precipitation was positively related to increases in fish weight and length, followed in the next year by increases in number, weight and length per tide.

Keywords

NEW ZEALAND;

FISH;

POPULATION BIOLOGY;

LONG TERM ECOLOGICAL RESEARCH;

LTER

Geography Keywords

NEW ZEALAND;

SOUTH PACIFIC OCEAN

Content Language(s)

English

Type of Document