Captive management of Birds Dhananjai Mohan Why conserve birds: Ecosystem Services - Ecosystem services: Important place in the food chain: Ecological balance - Direct role: Leaf Warblers in 1 ha. of tropical Forests consume 12000 insects in a day; in all 40 insectivorous birds in 1 ha. consuming 55000 insects a day. (KMTR, TN) - Removing them >Foliage tattered > endangered Langurs devoid of food > fewer flowers and fruits > nectarivores and frugivores get less food >regeneration goes down > ground dries faster >…… - Similar role in agricultural insect pest control Why conserve birds: Recreation - Aesthetics - Birdwatching: fastest growing outdoor recreational activity in the US; 20% population participated - In UK one in three are birdwatchers - In India too a hobby growing at a fast pace: local e-groups and associations - Special hobby unique to birds Why conserve birds: Economics - In US $25 billion industry - Birding Business magazine - The Economist journal (Aug 2004) - RSPB has 1m members - Runs the Rutland water birding fair (16th yr) - $5.4 m in 3 days - Number of serious birdwatchers in US has surpassed hunters - Swarovski: sale of optical instruments for birdwatching is going up - Ecotourism - 12 resorts in CTR catering to birdwatchers only (2001) Why conserve birds: Research and Monitoring - Important subject for evolutionary and behavioural research - Monitoring of habitats - easily available predators, conspicuous - Omnipresent - good population of birds & birdwatchers Conservation of Birds in India D:\106744047.doc 1230 species of birds out of 9000+ birds in the world (>13%) 48 of the 75 families represented – Merger of Oriental, Palearctic and Afrotropical realms – Wide habitat diversity Trans-Himalayas, Himalayas, Desert, Semi-Arid region, Western Ghats, DeccanPeninsula, Gangetic plains, North-Eastern India and Islands – Good conservation history – Religio-cultural practices Conservation of Birds in India Priority Setting for Conservation – Single species approach Red Data Books: Birds to Watch – Area - based approaches Geopolitical units ranking By total number of threatened (Cr, EN & Vu) bird species – – – – – .(104) Indonesia .(103) Brazil .(86) Philippines .(86) China .(73) India. Important Bird Areas (IBA) Identify, document, and advocate the protection and management of a network of sites that are important for the long term viability of naturally occurring bird populations Indian Bird Conservation Network (IBCN) To promote conservation of birds and their habitats thru’ dev. Of national n/w of individuals, organisations and the govt. Constituents – Bombay Natural History Society (BNHS) – Royal Society for the Protection of Birds (RSPB) UK – BirdLife International Inventories of internationally recognized sites vital for the conservation of birds Four standard global criteria Globally threatened species Restricted Range Species Biome restricted species (8 biomes) Congregation IBA Progress so far Various state and regional consultations held since 1999 465 IBAs identified D:\106744047.doc Final report released on 5th Nov.2004 in the form of a very detailed account of each IBA – 1200 page document – c. 1000 contributors Captive breeding and management of birds IUCN policy Ex situ: To maintain present biodiversity levels through all available and effective means including, where appropriate, ex situ propagation, translocation and other ex situ methodologies. Captive breeding: IUCN urges that those national and international organizations and those individual institutions concerned with maintaining wild animals in captivity commit themselves to a general policy of developing demographically self-sustaining captive populations of endangered species wherever necessary. National Zoo policy The objective of the zoos shall be to complement and strengthen the national efforts in conservation and strengthen the national efforts in conservation of the rich biodiversity of the country, particularly the fauna World Pheasant Association: Conservation breeding policy Conservation breeding of Galliformes should be undertaken as part of an integrated recovery strategy Managers of captive populations that are being managed for conservation purposes should adhere to the principles, and practices of population management. Reintroduction is not an automatic consequence of conservation breeding and should only be undertaken in accordance with the IUCN position Statement on Translocation of Living Organisms (1987) and the IUCN/SSC Guidelines for Reintroductions (1996) Captive breeding and species reintroductions Ex situ conservation: captive breeding, gene and seed banks, zoos and aquaria and all other forms of maintaining species artificially and off-site. Contrasts with in situ methods such as parks and habitat management. Introductions: releasing animals (captive or wild born) where they never existed. Usually because old habitat is gone or degraded, not available, but the new habitat is considered suitable Reintroductions: releasing captive born animals where they once existed. Only successful after you have corrected the cause(s) of the original population decline. Translocations: moving wild-born animals from one place to another. This is done when the wild population is in imminent danger of extinction due to habitat alteration. Captive Breeding Programs in Birds 10% of all bird species have been bred in captivity D:\106744047.doc Bald Eagle, Andean Condors, Bobwhite Quail, Greater Sandhill Cranes have been bred successfully and released in the wild Primary groups where captive breeding has been tried with success are raptors, cranes, waterfowl, pheasants, parrots. Rules For A Successful Reintroduction You need a self-sustaining Captive Population Require A Suitable Amount Of Adequate And Protected Habitat Effective Techniques To Prepare Animals For Reintroduction Post-release Monitoring And Evaluation Professional And Public Education Sufficient Long-term Funding Potential Californian Condor 15 birds (incl. 5 breeding pairs): 1984 3 males in 1986; 21 in captivity Reasons for decline – shooting by hunters – poisoning with bait intended for coyotes – contamination of their food with DDT, other pesticides and lead – egg collecting by unscrupulous oologists – general harassment – food scarcity and habitat destruction Californian Condor: recovery plan Centerpiece of the program: captive breeding The single egg normally laid in each nest would be removed (the female will often lay a second) and the young condor would be reared under laboratory conditions The goal was to establish a captive population that later could be used to restock empty habitat Captive breeding success in the past was a ray of hope Condors breeding successfully now in the wild Brown Teal Less than 1000 birds in the world Brown Teal captive breeding program – to maintain, manage and develop the Brown Teal captive breeding programmet – to retain known genetic diversity – annually supply known quality birds for release in the quantities and at the times required by the recovery programme – to contribute to Brown Teal advocacy 2000 birds have been reared in captivity since 1964. These have originated from just 76 wild birds. 21.5 birds being released for every wild bird taken into the programme D:\106744047.doc The captive population is more than 300% more efficient at producing these birds than are wild populations Recovery of Brown Teals Cranes Research into breeding techniques has intensified since the 1960s 15 species worldwide Can be reliably bred With few exceptions—the West African Crowned Crane, Wattled Crane, and Hooded Cranes maintenance of a captive population: necessary component of an overall strategy for ensuring viable wild populations: CAMP Captive propagation techniques double clutching or single egg removal hatching of eggs collected from the wild Translocation rearing at release sites releasing young supplemental feeding Captive propagation techniques Active reintroduction programs currently exist for the Whooping, Siberian, Mississippi Sandhill, Red-crowned, White-naped, and Wattled Cranes Sandhill Cranes have been used as surrogates to develop release methods for endangered cranes Results: mixed bag Greater Sandhill Cranes have been released onto breeding grounds with conspecifics and have successfully migrated (85%) and bred Main obstacles to successful releases: the difficulty of teaching migration routes to young birds, especially when wild conspecifics are not available Ultralight aircraft to lead the way; trucking birds between resting areas Attempts to release birds on their wintering grounds have failed to date Results….contd. For Sandhill and Whooping Cranes, the highest survival rates have been observed among offspring that have been raised by costumed humans and released as juveniles; Parent-reared birds have survived at lower rates and do better when mixed with costume-reared chicks Cross-fostering eggs into the wild nests of a more abundant species has been attempted with Whooping Cranes and Siberian Cranes. This technique is being tested on Siberian Cranes in the hope that the chicks cross-fostered by Eurasians can serve as guide birds for Siberians reared using other methods Pheasants Easy to breed D:\106744047.doc In India, Cheer and Western Tragopan have bred in captivity in Himachal Pradesh. No releases done till now. Extensively bred for zoo exhibits Some new Tricks Cross – fostering – Young raised by closely related sp. – Prevalent in birds: Jungle fowl and domestic chicken, Whooping crane eggs placed in Sandhill Crane nests Artificial Incubation – Mainly for reptiles and fishes Artificial Insemination – Mainly for mammal Embryo Transfer – Mainly for mammal – Embryo produced artificially transferred to the womb of a related non-endangered sp. D:\106744047.doc D:\106744047.doc